in the Journal of
the Society for Psychical
Vol. 51, No. 792, October
1982, pp. 343-367.
DOWSING: A REVIEW OF EXPERIMENTAL RESEARCH
by GEORGE P. HANSEN*
Although considerable research has been done
on dowsing, its status remains uncertain. This research is reviewed in
an attempt to clarify this problem. Late nineteenth and early twentieth
century work is summarized to provide historical background. The parapsychological
work and the experimental investigations concerning human sensitivity to
magnetic fields are reviewed; the results have not been consistent. In
both areas the level of experimental control has varied enormously, and
positive, although not conclusive results have been found with reasonably
good controls by investigators from both standpoints. The work on the physiology
of dowsing is also reviewed. The controversy regarding the cause of movement
of the rod, the Soviet research, and sociological studies of water witching
are also discussed.
Dowsing is a term commonly used to denote the practice of locating
underground water with a forked stick; however, in practice its use is
really not so restricted. Dowsing is also used to determine answers to
other questions such as the sex of an unborn child, and the location of
pipes, or for foretelling the future. Numerous exotic instruments have
been used by dowsers including scissors, pliers, crowbars, and even German
sausages. Probably the three most common instruments are the forked stick
or Y-rod, the pendulum, and the L-rod, usually made of a piece of wire
or rod bent in the shape of the letter ‘L’ The terms water witching, rhabdomancy,
radiesthesia, and water divining have also been used as synonyms for dowsing.
In this paper we shall consider downing to be a problem-solving
technique which apparently utilizes a motor automatism in conjunction with
a mechanical instrument to obtain information otherwise unknown to the
dowser. Classically, dowsing has been used to solve location problems with
the dowser standing or walking over the area of interest. Some dowsers
do not use instruments but experience bodily sensations (such as a feeling
of heat in the palm of the hand, or a sharp pain in the back). A few examples
of this will be considered. Animals also seem to have abilities to find
hidden objects (e.g. Rhine, 1971), but this topic will not be discussed
The historical origin of dowsing is unknown. Numerous references
to water finders and similar terms have led some to think that it is thousands
of years old. The first published description of the dowsing rod
is probably Georgius Agricola’s De re Metallica dated 1556 (translated
in 1912 by the then future president of the United States Herbert Hoover).
From an extensive survey of the literature, Barrett and Besterman (1926/1968)
found the first unmistakable reference to the dowsing rod was in 1430;
although many earlier works have been construed as referring to dowsing.
Two major works on the history of dowsing are by Barrett and Besterman
(1926/1968) and by Bird (1979).
The dowsing rod has always been steeped in controversy. Martin Luther
thought it the work of the devil. On the other hand, many medieval dowsers
* I wish to thank Dr. Robert Morris and Mark Shafer for
suggestions of improvements of earlier drafts of this paper.
Journal of the Society for Psychical Research
[Vol. 51, No. 792
baptised their rods along with a child so that they might address the
rods by a Christian name. Today the U.S. Geological Survey asserts that
dowsing does not deserve further study (Water Dowsing, 1977); it
claims to have reviewed scientifically controlled tests; but gives no indication
of what these tests were. Ellis (1917) wrote the only comprehensive report
on water dowsing to be published by this body. Although a 28 page bibliography
was included, no data were presented to evaluate dowsers’ claims; it was
largely a historical review. In contrast, the U.S. Army Corps of Engineers
has hired dowsers, and the Corps’ chief has said with qualifications that
he would hire a dowser under some circumstances (Dowsing Can’t Work . .
. And Bumblebees, of Course, Can’t Fly, 1968). The New York Times
reported that the U.S. Marine Corps used dowsing in Vietnam (Baldwin, 1967).
Various sources describe anecdotal cases (e.g. Barrett,
1900; Besterman, 1938; Bird, 1975, 1977, 1979; Dykshoorn, 1974; Haines,
1926; Katz and Paulson, 1948, 1949; McMahan, 1947; Pease, 1884; and Wyman,
1977). In Water Witching U.S.A., Vogt and Hyman (1959) argue at
some length that anecdotal evidence does not constitute rigorous scientific
proof of the effectiveness of dowsing.
Today two major controversies remain unresolved concerning
dowsing (apart from whether it works). The one most discussed is how the
dowser obtained the information he is seeking. The second question concerns
the cause of the rod’s movement; very little work has been done on this.
Some work however has been devoted to studying the physiological correlates
of dowsing reactions.
Several explanations have been put forward as to how the
dowser gets results. Debunkers claim that dowsers are little more than
good practical geologists (e.g. Riddick, 1951, 1952). Rawcliffe (1952/1959)
suggests that a dowser may occasionally exercise the maximum powers of
human observation (e.g. he may note the colour of soil and vegetation,
slight differences in growth of plants such as direction of root structure,
etc.), and that he processes all this information and moves the dowsing
instrument accordingly; at the unconscious level. This is a ‘normal inference’
explanation. A second explanation is that dowsers react to some known type
of radiation (e.g. electro-magnetic) in a little understood way—this is
often called the physical theory. A third explanation is that the dowser
uses some form of ESP. This has been called the psychical explanation;
although to some extent this may be said to explain the unknown by the
Normal inference explanations may account for some of the
anecdotal cases, but they are of little intrinsic interest. It is worth
noting that experiments have demonstrated the helpful effect of dowsing
in the presence of a person who knows where the hidden object is (e.g.
Stratton, 1921; Foster, 1923). The dowser in fact may be able to ‘read’
subtle behaviour cues as to location. Such possibilities should of course
be eliminated in experimental work.
This paper examines the scientific literature on dowsing
in the light of these controversies. A brief review of the late nineteenth
and early twentieth century studies gives some historical background. Experimental
work assuming a biophysical basis for dowsing is considered; a section
has also been included on experimental work concerning the physiological
concomitants of dowsing. The parapsychological investigations are reviewed
with special attention to adequacy of experimental controls. The controversy
regarding the movement of the rod is
discussed. Although most authorities believe that it is due to unconscious
muscular action, some evidence indicates that PK may sometimes be involved.
The scant information available from the Soviet bloc countries is reviewed;
and there is a section on sociological studies of ‘water witching’.
From the earliest days of the Society for Psychical Research,
and perhaps before, there was a controversy as to whether dowsing was a
physical or psychical phenomenon. Sir William F. Barrett, professor of
physics, at the Royal College of Science in Dublin and a principle founder
of the SPR, led research on the phenomenon and published two lengthy articles
in the Society’s Proceedings (Barrett, 1897-98, 1900-01). He favoured
the psychical explanation; although he also conducted experiments which
indicated that some individuals were sensitive to magnetic fields (Barrett,
1884). Continental investigators largely supported the physical hypothesis.
Carl von Klinckowstroem, a German research scientist, argued that dowsing
could be explained in purely physical terms although the actual physical
stimulus (or stimuli) has yet to be defined (Klinckowstroem, 1912, 1925,
1959; Besterman, France, and Klinckowstroem, 1931). Charles Richet, Nobel
prize winner and former President of the SPR, suggested that dowsers respond
to some type of radiation emanating from various materials (the prevailing
view of French dowsers of his day, e.g. Mager, 1931), but claimed that
it resembled cryptaesthesia, his term for ESP (Richet, 1923).
One of the experiments conducted by Barrett to test the
physical theory was to determine if dowsers could detect the presence of
radium salts (Barrett, 1910). Radium salts were placed in a lead case behind
the dowsers with the lid sometimes open and sometimes closed. The dowsers
involved registered reactions (sometimes quite violent ones) with the lid
both open and closed. It was concluded that radioactivity was not the dowsers’
source of information. It is not clear whether Barrett’s rather strongly
stated conclusions were completely warranted. No indication was given whether
or not the dowsers had more hits than chance would predict. The experiment
was apparently not conducted double blind; thus misleading sensory cues
could have biassed the results.
Barrett also conducted a number of experiments
which supported the psychical theory. Here is a description of one:
A coin was to be hidden in some
part of the room in the absence of the dowsers and while all those present
in the room looked out of the window, the person hiding the coin was then
to leave the room, and one of the dowsers called in to try and find the
coin. This was done five times; first the coin was hidden by Sir William
Barrett beneath an article lying on a chair in the large Council Room,
45 other chairs being similarly covered. The odds against finding the coin
at the first venture were thus 45 to 1, but when Mr. Young was called in
he immediately indicated the correct chair. Mr. Young again left the room,
accompanied by a guardian, and the coin was hidden under another chair,
which was again correctly indicated by Mr. Young. The odds against two
such consecutive successes being due to chance coincidence are 2,025 to
1. (Barrett and Besterman, 1926/1968, p. 258).
Journal of the Society for Psychical Research
[Vol. 51, No. 792
At the end of five trials, Barrett concluded that the odds against chance
occurrence were 80,000,000 to 1. Although these results are impressive
and some precautions were taken, not all normal influences were ruled out.
There is no indication that the chair selection process was random. The
hiding of the coin may have slightly disturbed the original positions of
the chairs thus giving a clue. Overall, the methodology of Barrett’s experiments
(at the same level as other investigators of his time) is inadequate by
The work done by investigators over 50 years ago can be
considered only exploratory. The procedures and results are difficult to
evaluate because often few details are given and afford no firm basis for
conclusions. Nevertheless the anecdotal material collected and the experimental
results obtained have suggested further areas of investigation.
To the orthodox scientific community, probably the most
acceptable method of studying dowsing is through biophysics. This approach
assumes that some humans may be able to detect low levels of known types
of radiation in a little understood manner. The most widely cited investigators
using this approach who have published in English include Maby and Franklin,
Tromp, Rocard, Harvalik, and Chadwick and Jensen.
A book published in 1939, The Physics of the
Divining Rod (currently available from University Microfilms), described
the experimental investigations of J. C. Maby and T. B. Franklin, who concluded
that ordinary dowsing sprang from a special physiological faculty which
could be explained along classical scientific lines (Maby, 1941). Although
this work is often cited, the published reviews have frequently been unfavourable.
The reviewers for the Society’s Journal and for Nature assert that
the experiments are not well enough described to evaluate (C. C. L. Gregory,
1940, 1941; Ellison, 1969; and The Physics of the Divining Rod,
One of the most extensive works describing experimental
research on dowsing from a biophysical viewpoint was written by Dr. Solco
W. Tromp. Tromp, a Dutch professor of geology, has produced numerous articles
on geology and two books on medical subjects and served as the director
of the Bioclimatological Centre in Leiden. His most widely cited book in
psychical research is probably Psychical Physics (reviewed by Robertson,
1950; R. Wilson, 1951). Much of this reviews literature concerning the
effects of electric, magnetic, and electromagnetic radiation on biological
organisms. It also surveys the literature on geophysical fields and meteorological
fields such as radioactivity and air ions, and—more briefly—some tests
conducted in both laboratory and field conditions to determine levels of
sensitivity in dowsers, and the physiological changes they experienced
during dowsing. The volume covers many areas; the bibliography cites 1496
items the majority not in English. Tromp (1955, 1968, 1972) has also published
brief articles dealing with additional research findings and summarizing
some of the material in his book.
Tromp conducted tests to determine dowsers’ sensitivity
to magnetic fields in the laboratory. A tangent galvanometer with a wooden
ring of 1.0 meter diameter and one coil of wire was used to create a magnetic
field. The galvanometer was equipped with a reportedly noiseless switch
swivel. For many of the tests, dowsers used a U-shaped rod. Tromp found
that dowsers could detect changes in the strength of an electromagnetic
field (for instance, by walking through an area with a varying field strength,
by switching current on or off, or by changing the direction of the field)
but could not detect the field strength itself. His experiments showed
that sensitive dowsers could detect gradients of less than 0.1 gauss per
meter (the strength of the earth’s field is roughly 0.5 gauss, a child’s
magnet is of the order of 1,000 gauss). After 20 trials the dowsers became
fatigued and could not respond accurately, but for the first twenty trials,
those he found sensitive responded correctly 80 per cent of the time. The
tests with the tangent galvanometer were conducted with the dowsers blindfolded
and with cotton-wool placed in their ears. The person recording the responses
was not aware the current was on or off; however, the experimenter controlling
the switch was in the same room as the dowser. Tromp noted that some dowsers
took up to eleven seconds to respond to the change in the electromagnetic
field; but did not mention how the length of each trials was established
or the actual number of subjects, trials, or successes.
In other tests conducted with the artificial magnetic fields,
dowsers used pendulums. Tromp found that persons not sensitive to the artificial
fields when using the loop shaped rod, were sensitive when using the pendulum;
and also that, in contrast to findings with the rod, persons using a pendulum
could detect differences in field strength. The numbers of subjects, trials,
and successes were again omitted.
Tromp reported moreover that dowsers could detect electrostatic
fields. The experiments are described briefly and the level of experimental
control undertaken is not clear.
Tromp also tested dowsers under field conditions.
Dowsers were led along a path in a house, and locations where dowsing reactions
occurred were noted. For most of the experiments, dowsers used pendulums
as dowsing instruments because Tromp found that they produced the quickest
reactions. A magnetic survey was made afterward along the same path. Definite
correlations were found between the ‘dowsing zones’ and the magnetic disturbances.
Dowsers were also tested out of doors to determine if they could locate
subsurface discontinuities which could not be predicted by even very experienced
geologists or botanists. They traversed a pre-assigned path and their reactions
were recorded. A soil resistivity survey was made after the dowsing tests
(resistivity surveys indicate underground discontinuities). In nearly all
the surveys statistically significant correlations were reported between
low soil resistivity and dowsing reactions. It was not clear whether the
soil resistivity survey was conducted by a person blind to the dowsers’
Although Tromp found strong correlations between changes
in magnetic field strength and dowsing zones, he did not conclude that
there was a causal relationship between the two where field conditions
were concerned. He suggested that dowsers might be sensitive to very low
level infra-red radiation, since they could detect changes in soil resistivity
although the accompanying magnetic field fluctuations were very small (producing
gradients far smaller than those detected by dowsers in his laboratory).
Unfortunately he did not present any experimental data to support this
hypothesis. Tromp ruled out a psychic explanation since his dowsers could
Journal of the Society for Psychical Research
[Vol. 51, No. 792
zones of disturbance (e.g. low soil resistivity) at a distance. Map
dowsing tests he conducted with people claiming such ability were unsuccessful
(Tromp, 1968). As no details were given, an evaluation of the methods and
results is not possible.
Yves Rocard, professor of physics at the Ecole Normale
in Paris, also studied the relation betweeen dowsing and electromagnetic
radiation. Much of his research on dowsing is discussed in his book Le
Signal du Sourcier (reviewed by Montgomery, 1964; Parsons, 1963; and
Thouless, 1964). Only two very brief summaries seem to have appeared in
English (Rocard in Barnothy, 1964; L’Huillier, 1968). In his experiments
Rocard set up a wooden frame (50 cm by 100 cm) wrapped with 100 turns of
fine wire. The frame was placed in a location with reportedly no stray
magnetic gradients. The subjects were given a brief training period on
how to hold the Y-rod and allowed to practise when they knew the current
was on or off. Rocard reports that during the testing, every precaution
was taken to prevent the dowser from knowing whether the experimenter turned
the current on or off but gave few details. He concluded that a dowser
could detect a changing artificial magnetic field of the order of 0.3 to
0.5 mO/m (approximately equivalent to 0.0003 to 0.0005 gauss per metre
in air) at the level of the subject’s chest if the dowser were walking
at a normal speed. Rocard claimed that a good dowser is never wrong when
attempting to detect this signal as long as he is not overworked. He noted
that smaller gradients could be detected if the dowser were walking faster
or travelling in a vehicle as long as the change was at least 0.3 to 0.5
mO/sec (0.0003 to 0.0005 gauss per second). It was also found that the
reaction of the dowser was more pronounced if two coils of wire were used
in series. This gave the dowser a longer exposure to the field. Rocard
noted that below 0.1 mO/sec (0.0001 gauss per second) detection was inaccurate.
It was also found that gradients in excess of some uncertain amount produced
‘saturation’; presumably this means that the dowsers were not sensitive
to gradients above this level. Rocard also noted that if magnets were attached
to the forearms of the dowsers, no reaction was obtained, but if a similar
non-magnetic object were used, the dowsers were still able to respond.
Presumably no indication was given to the dowsers as to which were and
were not magnetic. It was also observed that dowsers’ responses were much
less clear with a pendulum than with a rod (although this contrasts with
Tromp’s comments, it should be noted that Rocard’s subjects used a type
of rod unlike those used by Tromp’s subjects). No indication is given as
to the number of subjects Rocard tested; thus it is difficult to know whether
the indicated range applies to most or only a few dowsers.
Rocard noted that water filtering through porous
media in permeable layers next to clay layers might be expected to produce
a magnetic gradient on the order of 0.1 mOe/m (0.0001 gauss per metre).
One of the most prolific American investigators of dowsing
is Dr. Zaboj V. Harvalik, a retired professor of physics formerly at the
University of Arkansas and a former adviser to U.S. Army’s Advanced Concepts
Materials Agency. He is now a vice-president of The American Society of
Dowsers (ASD). Nearly all his work has been published in The American
Dowser, the quarterly publication of ASD (and has appeared in nearly
every issue since 1970). The present writer does not know whether independent
investigators have tried to replicate it. Much of this work was done with
electromagnetic fields. He, too, has found
that dowsers are sensitive to changes in magnetic field strength though
not to absolute magnitude, but believes them to be much more sensitive
than other investigators have indicated and that a fairly sensitive dowser
can respond to a change of 1 X 10-6
gauss per second (Harvalik, 1970). Later in this report he claimed that
an average dowser could detect a change of 3 X
10-7 gauss, a skilled dowser 3 X
10-8 gauss, and an exceptional dowser 7 X
gauss (the actual gradient involved is not completely clear) and that he
tested one subject, Mr. De Boer, who could detect changes of 2 X
10-10 gauss. He mentioned that he found the L-rods gave better
results than the forked stick and were easier and more sensitive for inexperienced
dowsers. Only final results are presented in many of his reports, and methods
of statistical evaluation are not discussed. It is unknown whether double
blind conditions were strictly observed and whether all normal sensory
cues were eliminated. One of his reports (Harvalik, 1978) is notable for
the amount of detail it contains; it is discussed further in the Physiological
Studies section of this paper.
Harvalik also found that dowsers could detect and discern
different radio frequencies and radioactive substances even with considerable
shielding (Harvalik, 1973a; Harvalik and De Boer, 1976). As with many of
his experiments, the level of control is uncertain, and replication by
others is needed before conclusions can be drawn.
Duane Chadwick and Larry Jensen, electrical engineers from
Utah State University, produced one of the most detailed reports of a preliminary
investigation concerning magnetic fields and dowsing. In a series of experiments
(Chadwick and Jensen, 1971), a number of subjects, most without previous
dowsing experience, separately walked along several pre-assigned paths
with dowsing rods (mainly L-rods). They were given a set of wooden blocks
and asked to place a block at each location where they obtained a dowsing
reaction. After the dowsers had traversed the path, a magnetic survey was
A statistical analysis was made to determine whether
there was any patterning of the dowsers’ responses. Chadwick and Jensen
found that on certain portions of the path, dowsers were much more likely
to experience dowsing reactions. The probabilities of this patterning (more
reactions in some areas than others) occurring by chance ranged from p
= 0.06 to p < 0.0005. If this were a parapsychological experiment, one
might conclude that a very strong stacking effect was observed.
Chadwick and Jensen gave a graphical representation of
the relation between the dowsers’ responses and the magnetic field but
did not present a full statistical evaluation of these data; so it is not
clear whether the correlation would be statistically significant (though
it well may be). In areas with a gradient of 0.5 gamma per foot (0.000016
gauss per metre), more reactions were obtained than when the gradient was
In some experiments an iron bar was buried along the test
path and there was reportedly no visual indication of its presence. The
iron bar produced a distinct magnetic anomaly. From the graphical data
presented it seems unlikely that the number of dowsing reactions near the
bar was due to chance.
In another experiment the subjects were given 30 wooden
blocks and were asked to drop them wherever they felt like it while on
an assigned path. The patterning of responses among the subjects was more
consistent than would be
Journal of the Society for Psychical Research
[Vol. 51, No. 792
expected by chance at the 10 per cent level. When compared with the
magnetic survey, on the average there were as many reactions in areas with
the gradient greater than 0.5 gamma per foot (0.000016 gauss per metre)
as in cases with a smaller gradient. It appears that this method which
requires some conscious involvement to achieve a dowsing response was not
effective. The apparently unconscious movement of the dowsing rods seems
to make for greater accuracy.
Chadwick and Jensen did present calculations to show that
the expected change in the magnetic field due to an aquifer (an underground
formation containing water) could be as high as 0.0043 gauss. From previous
data it seems that a dowser might be able to detect this. However, Chadwick
and Jensen did not conclude that dowsing was necessarily an efficacious
method of locating underground water. They noted that no wells had been
dug in their study, that the type of information actually used by the dowsers
was undefined, and that the patterning of the dowsers’ responses was not
necessarily due to magnetic anomalies. Although they did not conclude that
dowsers were sensitive to magnetic anomalies, they did conclude that further
research was warranted and recommended that extraterrestial radiation be
monitored during testing, or that tests be conducted in an environment
shielded from all extraneous magnetic influences. They also noted that
it is not clear which (if any) magnetic field the dowser might be detecting
(e.g. field at ground level, at head level, gradients in vertical or horizontal
W. H. Jack, a parapsychology instructor at Franklin Pierce
College in New Hampshire, experimented to determine whether subjects could
use dowsing to detect a current flowing through a wire (Jack, 1978). The
twelve subjects, members of an experimental parapsychology class, used
L-rods to determine whether or not a current of 0.1 amp was flowing through
an extension cord (no data were given as to the resulting magnetic field
strength or gradient). The subjects were asked to report whether the current
was on or off. Of 240 trials, there were 141 hits (p < 0.01). Jack indicated
that the subjects were in familiar surroundings, in good rapport, and involved
in the experimental design, but admitted that the study was not conducted
double blind. The person recording whether power was on or off also recorded
the dowsers’ responses—allowing the possibility of biassed recording errors.
From the report, one might be given the impression that the subjects were
using psi to obtain the correct results; even if there were no recording
errors or other sensory leakage, there could have been an effect due to
electro-magnetic radiation. The report does not show whether the intent
was to investigate a psi phenomenon or a biophysical one.
Jack (1977) also conducted an experiment in which six rather
inexperienced dowsers (college students) attempted to locate a vein of
water previously dowsed by several more experienced ones. Twenty-six two-metre
long intervals were marked with stakes along a road, and the subjects were
asked to use L-rods to determine the previously selected interval. A majority
vote was taken, and the group did pick the correct interval, p = 0.038.
A definite effort was made to establish a realistic dowsing situation and
psi conducive environment. The subjects were told that the experimenter
planned to build a house and needed a well and were encouraged to visit
the site when the well was to be dug. A picnic was held after the dowsing
test. It appears that the test was not conducted double blind; the experimenter
apparently knew the location of the pre-selected interval
and was present during the test. It is also uncertain whether
the dowsers were using psi, or reacting to some electromagnetic radiation,
or some other stimulus. Overall, the result basically confirms the patterning
of responses noted by Chadwick and Jensen.
Several experimental failures to support the electromagnetic
hypothesis have been reported.
Foulkes (1971) attempted to replicate Rocard’s work with
artificial magnetic fields. Coils of wire similar to his were set up. The
dowser (who claimed such ability) was given a short series of learning
trials in which he knew whether the current was on or off. Three runs of
25 trials were held with no indication given to the dowser whether the
current was on or off. Only chance results were obtained. Unfortunately
only one dowser was used in this study. No mention was made whether there
were possible magnetic anomalies in the area of the testing.
Whitton and Cook (1978) also conducted two experiments
attempting to determine whether subjects could detect the presence of weak
magnetic fields. In the first, twenty-seven subjects, two believing themselves
to be dowsers, were asked to determine whether current was flowing through
a coil similar to that of Rocard’s (here alternating current was used).
Each was allowed a preliminary learning trial conducted without the use
of dowsing instruments, although the subjects were allowed to move around.
They simply stated verbally whether the current was on or off. Only chance
results were obtained. In the second experiment, eleven subjects, none
of them professional dowsers, were asked to determine whether current was
flowing through the coil of wire when it was placed in a known horizontal
position beneath the floor of the room. In this case direct current was
used. The subjects were given L-rods to use. Again they gave verbal reports.
Here also only chance results were obtained. No mention was made as to
whether there were possible magnetic anomalies at the test site.
Balanovski and Taylor (1978) claim to have tested
dowsers’ sensitivities to magnetic fields. They found that those tested
were insensitive to fields of 100 gauss. Taylor (1980) reported that one
dowser tested with 500 gauss was also not sensitive. No gradients were
indicated in the reports, and no details were given as to testing procedure.
Taylor and Balanovski (1979b) also tested a number of persons, including
dowsers, for sensitivity to high-frequency low power level electromagnetic
fields. The subjects sat close to an antenna while the power was randomly
switched on or off. Between 10 and 60 trials per subject were conducted
but they were apparently unable to tell whether the power was on or off.
Taylor and Balanovski (1979a, c) conclude that dowsing is not possible
because the level of sensitivity required is far greater than that they
claim for human capability.
Much work has been done concerning the effects of electromagnetic
radiation on living organisms; Barnothy (1964), Presman (1970), Persinger
(1974), and Dubrov (1978) have summarized the findings. Except for work
on dowsing, very little has been done to determine the effects on humans
of very slight changes in magnetic fields. Some work in biophysics indicates
that at times a small field has a greater effect on a living organism than
a stronger field (Prcsman, 1970). There have been anecdotal reports of
persons receiving radio broadcasts from the fillings in teeth; presumably
the radiation involved is relatively low intensity. Wieske (1963) reported
two cases of amazing auditory sensitivity to electric
Journal of the Society for Psychical Research
[Vol. 51, No. 792
fields. One woman could even hear telephone conversations by listening
to the wires!
Because of the wide range of findings reported as to the
sensitivity of dowsers it is difficult to draw conclusions. Although there
is positive evidence that humans do have some ability to detect weak electromagnetic
fields, the results of Whitton and Cook, and Balanovski and Taylor challenge
the conclusions of other investigators. It is far too early to conclude
that this sensitivity can be used to detect underground water.
Further experiments appear justified and could have wide
ranging implications. Work could be done to determine human thresholds
of sensitivity to horizontal and vertical magnetic fields (ideally in a
shielded environment to eliminate extraneous magnetic fields). The psychological
state of the subjects might usefully be varied; perhaps relaxation would
facilitate greater sensitivity. Any further work must use extremely tight
controls to rule out alternative information sources. The results of such
experiments might indicate unsuspected communication systems; if so, such
knowledge would have useful applications.
In contrast to the biophysical investigations just discussed,
there is considerable agreement among studies of the physiology of dowsing.
Various anecdotal reports indicate that some good dowsers experience profound
physiological changes while dowsing. Barrett and Besterman (1926/1968)
reported instances of dowsers becoming dizzy or sick while standing over
underground water. Bill Cox, a prominent American dowser, reported that
an extremely sensitive dowser he trained would vomit while standing over
a good water well location. Tromp and Rocard have reported on European
work, and Harvalik has described more recent American work.
Tromp (1949) conducted a number of experiments
measuring the skin potential between wrists of dowsers. Tests were used
to monitor skin potential while dowsers were exposed to artificial magnetic
fields, while walking through ‘dowsing zones’ (a rather vague term; in
some instances they were definitely associated with magnetic anomalies),
and while walking next to human beings. An Einthoven string galvanometer
was used to record skin potential. The loop-shaped dowsing rod was placed
in insulated grips, and a special circuit was established which included
part of the dowsing rod (Tromp conducted several experiments to ensure
that the circuit did not change skin potential).
In dowsers exposed to an artificial magnetic field from
a tangent galvanometer, changes in skin potential were registered almost
immediately after the field was developed. The report does not show whether
the dowsers knew whether or not the current was on. Tromp cited evidence
to support the argument that changes in the electrocardiograms recorded
by the Einthoven string galvanometer during these experiments were not
due to psycho-galvanic reflexes (a psycho-galvanic reflex is a sudden decrease
in skin resistance accompanying a mental reaction such as that caused by
calling a person’s name (frightening him, etc.). Tromp tested the monitoring
equipment to ensure that the change was not caused by induction potentials.
In other experiments, he had dowsers walk over dowsing zones while their
skin potential was being monitored. Very distinct changes were found while
the dowsers were in the dowsing zones,
changes which did not occur if the dowsers were outside a dowsing zone
and intentionally moved the dowsing rod. He also found that the same changes
occurred when the dowsers walked through the dowsing zone but did not carry
the rod and that persons not especially sensitive exhibited similar changes
except the changes were slower and less pronounced.
Tromp noted that persons sensitive to dowsing had much
lower skin resistance than those not sensitive, and claimed that non-sensitive
persons can be made sensitive for a short time by washing their hands.
In other experiments, the skin potential was monitored while a dowser moved
the rod over the body of another human. Tromp found differences when the
rod was held over the head and when over the feet. There were different
changes for men and women. Few details are given of these experiments;
the results would be strengthened if influences such as psycho-galvanic
action could be convincingly ruled out.
A number of American studies have been done with Henry
Gross, a dowser made famous by the works of historical novelist Kenneth
Roberts (1951, 1953, 1957).
Gallay (in Roberts, 1953) reported on a short study conducted
with Henry Gross by a group of electrical engineers familiar with Tromp’s
work. They attempted to verify and extend it. For the first part of the
experiments, the skin potential was monitored while working indoors doing
‘long range’ dowsing rather than walking back and forth over known underground
water. On some of the trials a noticeable change occurred; however, subsequent
trials did not obtain significant results. In the latter part of the experiments,
the tests were conducted near a known vein of water. When Gross walked
over the vein of water, a change of 100 millivolts was noted, which returned
to approximately normal after he crossed it. For the nondowsers tested,
changes of less than 10 millivolts were generally recorded. In a later
set of experiments, Gallay tested a Canadian dowser, Desrosiers. Desrosiers
used no dowsing instrument but experienced his dowsing reactions as painful
sensations on the soles of his feet and in the small of his back. Changes
in skin potential were from 100 to 200 millivolts when he walked over the
known water vein. The maximum change noted with a number of non-dowsers
was 30 millivolts. The location of the water vein was apparently known
to the dowsers; again the results would be strengthened if psycho-galvanic
action could be ruled out.
Berthold E. Schwarz, a psychiatrist, also investigated
the physiological and psychoanalytical aspects of Henry Gross’s dowsing
(Schwarz, 1962-63 and 1968). Electroencephalographic studies were made
while Gross was dowsing for water veins near the laboratory; map downing
for water; and dowsing for objects hidden in the laboratory. Schwarz concluded
that there were no associated measurable changes on the EEG other than
increased eye movement and muscle artefact. The report indicates that all
testing was done in the laboratory but none while Gross was crossing an
underground vein of water or other dowsing zone. Although these tests were
not designed to determine dowsing’s effectiveness, Schwarz did report some
notable successes for near distance dowsing, map dowsing, and dowsing for
hidden, objects. These can only be considered anecdotal cases because no
statistical evaluation was presented and the tests did not always exclude
sensory cues. Schwarz also conducted experiments monitoring respiration,
Journal of the Society for Psychical Research
[Vol. 51, No. 792
pulse pressure, and pulse rate. During the periods in which dowsing
was attempted the respiration became irregular, the skin resistance decreased,
the pulse pressure increased and the pulse rate slightly increased. While
Gross was dowsing, the electrocardiograms showed an increase in heart rate
of 23 per cent compared to a rest period. These experiments were conducted
both in the laboratory and when dowsing for water in the neighbourhood.
Schwarz concluded that polygraphic studies suggested that dowsing is associated
with a significant expenditure of energy and is a rather abrupt process.
The same conclusion could have been reached by watching Gross while he
Rocard (in Barnothy, 1964) made several comments on the
physiology of dowsing. He noted that electrical resistance between palms
of the hands for a ‘good’ dowser is 1/3 to l/4 that of a ‘poor’ dowser.
No details were given as to how this was determined. Rocard suggested that
nuclear magnetic resonance might explain a dowser’s sensitivity to magnetic
gradients. He argued that protons of the dowser’s body in the weaker portion
of the field might move at a different rate than those in a stronger portion.
This would cause beats detectable by the dowser. Apparently no experimental
work was done to test this hypothesis.
Harvalik reports two experiments attempting to
locate dowsing sensors in the body. In the first (Harvalik, 1973b), a dowser
walked over several dowsing zones (undefined) while a magnetic shield was
placed over various portions of his body. Harvalik concluded that the dowsing
sensors seemed to be located between the seventh and twelfth rib somewhere
in the body. It is not clear whether the experiment was conducted double
blind and whether sensory cues were eliminated. In a well described second
experiment, Harvalik (1978) reports a study with dowsers detecting low-power
high-frequency electromagnetic fields. Fourteen reputed dowsers participated
with 694 trials (661 hits, 33 misses). The high-frequency generator was
randomly switched on or off; the trials were conducted double blind. Pieces
of aluminium sheet were placed on various portions of the dowser’s body
to shield the ‘dowsing sensors’ from the radiation. Harvalik concluded
that the sensors exist in the area of the kidneys and in the brain, possibly
in the pineal region. Several questions can be raised about this experiment.
Were the dowsers responding to the electromagnetic radiation or to some
other possible stimulus associated with the high-frequency generator (e.g.
slight noise or heat)? Secondly, were the dowsers aware of the experimenter’s
expectation as to location of the sensors? If the dowsers were always able
to sense the field, they may indicate no reaction when the shielding was
placed in a position they expected to be effective. Overall, given the
high rate of success, this is one of the best experiments supporting the
validity of dowsing.
Cope suggests several mechanisms to account for sensitivity
to magnetic fields. Thus, biological superconductive Josephson junctions
might explain such sensitivity (Cope, 1973). In a series of articles (e.g.
Cope, 1978, 1979a, 1979b) he suggests that magnetoelectric dipoles might
help to explain dowsing as well as auras and other reported phenomena.
His work has been financed in part by the U.S. Office of Naval Research.
He has not supported his ideas with direct experimental evidence.
Another concept that may concern physiological effects
is the rather obscure idea of ‘noxious rays’. Some dowsers believe that
at certain locations, the earth gives off rays which damage health. Most
investigations of this have been done in
continental Europe, and few references have been translated. Klinckowstroem
(1959) briefly presented some of the European findings. He concluded that
dowsers may indeed react to stimuli from the soil; although their nature
may be unknown. Tromp (1968) also reports experiments done in continental
Europe. One study found that mice preferred to sleep outside a dowsing
zone rather than in one. Mice treated with a carcinogenic tar were said
to develop 30 per cent more carcinoma when placed inside dowsing zones
rather than outside them. In another experiment, dowsers located several
dowsing zones, across which a hedge was later planted. The hedge grew well
except at the dowsing zones. Bird (1979) has compiled an extensive list
of references on the subject and has described a number of anecdotal cases
and experimental investigations. Because the sum- maries in English are
quite brief, it is not possible to evaluate this work critically.
Two topics seemingly similar to noxious rays are those
of ley lines and earth energies (supposed systems of energy patterns related
to specific geographical locations and detectable by dowsing). C. Wilson
(1978) has described some beliefs about this. There seems to be considerable
current interest in this area; The American Dowser (Earth Mystery
Related Publications, 1980) recently listed nine different publications
concerned with it. Nevertheless, the present writer knows of no well controlled
experimental work dealing with it. Zorab (1959) mentioned that the Royal
Academy of Science of the Netherlands had investigated claims regarding
earth rays and found them unconfirmed. Hopwood (1979) claimed to have established
an artificial ley with a wire and monitored his own dowsing reactions;
but Scorer, Parsons, and Tart (1980) pointed out that as the tests were
not double blind no conclusions could be validly drawn from them. Taylor
and Balanovski (1979b) reporting a test in which dowser Bill Lewis claimed
to detect energy bands around an ancient standingstone, noted that magnetometer
readings seemed to validate Lewis’s claim but that a more sensitive magnetometer
would be required for a definite conclusion.
Various studies of the physiological changes accompanying
dowsing reactions seem to agree. Changes in skin potential were noted by
a number of in- vestigators. There seems to be no evidence disputing this
finding for the cases in which a dowser crosses a ‘dowsing zone’. Pisani,
Deodato, and Nigro (1969) report that a magnetic field (800 Oe) applied
to the palms of the hands reduced electrical skin resistance. Perhaps additional
work on acupuncture (as described by Tiller in Mitchcll, 1974) or other
work involving electrical conductivity between points on the skin would
shed further light on this matter. Although considerably less work has
been done on physiological effects than in attempting to determine whether
humans are able to detect weak magnetic anomalies or other electromagnetic
radiation, what has been done strengthens the evidence for human sensitivity
to such weak anomalies. Harvalik’s work attempting to locate dowsing sensors
is especially notable for this.
Since early investigations by the SPR, various investigators
have approached dowsing from a parapsychological standpoint, notably at
the Parapsychology Laboratory at Duke University. As with the biophysical
work, various levels of control were used, and results have not been consistent.
Journal of the Society for Psychical Research
J. B. Rhine (1950) tested Henry Gross to determine if he
could discern whether or not water was flowing through an underground pipeline.
The control valve was some distance from the dowsing site and was out of
sight of the dowser. For some of the trials a coin toss was used to determine
whether the water was to be turned on or off; for other trials it was determined
mentally by the experimenter.
In the first section of the experiment, significant missing
was found (p < 0.001), and the consistency of the missing was also impressive.
A noticeable decline effect was also noted between the first and second
halves; however, it was not quite significant. Rhine felt that the results
indicated the use of ESP and discussed this later (Rhine, 1952). Several
weaknesses of this pilot study should be noted. Possibility of sensory
leakage was not completely eliminated. Slight vibrations from water moving
in the pipe might have been present, and verbal cues between experimenters
might have been possible. Although several impressive statistically significant
items were found, it seems they were derived from post-hoc analysis, and
as discussed by Nicol (1955), this might be explained by possible nonrandomness
of the experimenter’s mentally determined trials. Taking all the data
presented of the tests with Henry Gross, there was no overall significant
hitting or missing; Rhine did not comment on this.
Remi Cadoret, an M.D. on the staff of the Duke Parapsychology
Laboratory, also investigated dowsing. He experimented to determine if
the results and patterns of responses on one ESP task could be used reliably
to predict results on another similar task (Cadoret, 1955).
Several pilot series were first run. A penny was
placed under one of 25 tiles arranged in a grid (5 by 5). The subjects
were taught to use a pendulum (a button on a string) as a dowsing tool
and were asked to pick the row and the column containing the penny. Although
the possibility of sensory cues was not completely eliminated, overall
results were not significant. However a very significant decline effect
was found between the first and second halves (p = 0.0014).
In another experiment a map was laid over the 5 by 5 grid.
The map showed the squares corresponding to the tiles underneath and also
corresponding to a grid established in the back yard of the experimenter.
For some of the trials, a penny was placed under a tile beneath the map;
for other trials a penny was placed in one of the back yard grid squares
(the subjects did not know whether the penny was under the map or in the
back yard). For this experiment each subject made 18 responses, six using
the pendulum, six using roller bearing dowsing rods (apparently L-rods),
and six with the subjects calling his findings aloud. From the results
of the tests with the pennies below the titles, Cadoret noted the pattern
of response in relation to the target (e.g. some dowsers might consistently
miss the target by one row or column). He devised a mathematical procedure
to predict the correct target square given the dowser’s response, and was
able to predict the location of the pennv for those trials in which the
penny was in the back yard significantly better than chance, p = 0.018.
This experiment was the most tightly controlled, and sensory cues seem
to have been completely ruled out.
Karlis Osis also carried out several dowsing experiments
while working at the Duke Parapsychology Laboratory (Osis, 1960). One of
his special subjects was a Mr. Gwaltney, a superintendent with a local
gas company. For one of the tests,
ten small trenches were dug and covered with boards. Eighteen inch long
pipes were randomly placed in the trenches. The subject then walked over
the trenches while holding a pair of dowsing rods. In the first part of
the experiment, the experimenter was present with the dowser, knew the
location of the pipes, and recorded the subject’s responses, but for the
rest of the time the location of the pipes was unknown to the experimenter
who recorded the responses. In the experiment with the targets unknown
to the experimenter the results were marginally significant (p = 0.03).
For the entire experiment, the results were quite significant (p = 0.003).
Normal sensory cues could possibly have played a part; each time the targets
were placed, there may have been some slight tell-tale disturbance of the
surrounding area. The type of material of the pipe is not mentioned; perhaps
the results could be explained by sensitivity to magnetic anomalies rather
Osis also conducted tests in the laboratory with two selected
subjects; one had had spontaneous psi experiences, the other had previous
dowsing experience. Either money or photographs were randomly placed under
one of 25 tiles arranged in a 5 by 5 grid. Subjects were asked to indicate
the row and column in which the target object was placed by using a button
on a thread as a pendulum. Based on direct hits, the results were marginally
significant (p = 0.02). Details given in the report are rather sketchy,
and it is difficult to trace whether sensory cueing could have been involved.
Osis also tested Cadoret’s hypothesis that the patterns of hits and misses
on one task could be used to predict hits for a similar task; his data
did not support the hypothesis.
Map dowsing tests were conducted at the Parapsychology
Laboratory with subjects as far away as Germany. No significant results
were obtained. Osis did find one subject with whom there were indications
of a consistent missing pattern which might have confirmed Cadoret’s hypothesis,
but not enough data were collected to draw final conclusions.
Two short studies were reported by Pope (1950)
in Parapsychology Bulletin. Miss Kirby, Lecturer in Biology at Harrogate
Training College in England, conducted a series of tests in which a special
subject attempted to locate a coin placed under one of several possible
pieces of thick cardboard. Although the experiment was rather short (63
trials), the results were very significant (p < 10-6), but
though precautions were taken, sensory cues might have been available.
In tests conducted by the Physiology Department at Guy’s Hospital London,
dowsers were asked to determine whether or not water was flowing in a concealed
pipe beneath them and to locate the courses of underground drains. Details
are sketchy, and sensory cues were apparently not eliminated; they found
quite positive results. Unfortunately few details are available, and no
number of trials or successes was given.
Moss and Sands (1970) report an experiment in winch an
experienced dowser was pitted against a novice and a person using a ‘scientific
method’ to predict winners of horse races. The dowser held a pencil over
the racing form until a pull was felt to the name of a horse. The novice
attempted a similar method. In the first experiment the dowser ‘won’ more
money than the other two when imaginary bets were placed but no statistical
comparison was made in the report to determine whether the results were
significantly different from chance. Recently, Anselmo (1978) reported
a successful dowsing test. Subjects were
Journal of the Society for Psychical Research
[Vol. 51, No. 792
asked to locate coins underneath poster-boards. The overall results
were considerably above chance (p < 0.001). It is not clear whether
sensory cues were entirely eliminated, and the experimenter recorded both
the dowser’s guess and the actual location which allowed possible biased
Francis Hitching (1978), author of the book Dowsing
The Psi Connection (reviewed by Cox, 1978; and Hvman, 1979), conducted
a map dowsing experiment testing Bill Lewis, a retired electrical engineer
in South Wales, to see if he could use dowsing to locate ancient megalithic
sites (standing stones, burial chambers, etc.) in North America. Lewis
was given maps of several areas and asked to locate such sites. He held
a pencil in one hand and a pendulum in the other; and he moved the pencil
over the map until the pendulum indicated a good site. Lewis then asked
himself a number of questions which could be answered yes or no. From the
information so derived, he gave a description of the site. These predictions
and locations were shown to John Stiles, chairman of the ESP committee
of the SPR; he formulated a series of similar predictions for locations
near the sites of those of Lewis. Stiles made his predictions by guesses
based on those of Lewis. Hitching then visited most of the sites and compared
the two sets of descriptions with the sites. He found much greater correspondence
with the predictions of Lewis than those of Stiles. The major weakness
of this procedure is the difficulty of making an unbiased evaluation. The
descriptions given by Hitching did indicate that unusual results may have
been obtained (his claims were far stronger). More rigorous controls could
produce a more convincing demonstration.
A number of unsuccessful experiments have been
reported. Mr. P. A. Ongley, a New Zealand research chemist, tested the
claims of 75 dowsers. These ranged from medical diagnosis to tracking people,
etc. He concluded that all were unwarranted. Although many tests were conducted,
and a large amount of numerical data was presented in his article (Ongley,
1948); few details were given. Many of the claims appear to have been tested
with only one or two trials. He seemed to make the tests fair to the dowsers,
but the tone of his report suggests that he probably had a rather strong,
preconceived opinion against dowsing.
Another series of unsuccessful experiments was reported
in Nature by R. A. Foulkes (1971). Experiments were organized by
the British Army and Ministry of Defence to determine if buried mines could
be located by either map or field dowsing; dowsing for water was also tested.
For the map dowsing tests, 20 inert mines were buried along several military
roads. Seven dowsers were given maps of the roads and asked to locate the
mines. Only chance results were obtained. For the field dowsing, a 20 by
20 grid was established with each square being 20 feet (6.1 metres) on
a side. Five different types of objects (80 of each type) were buried randomly.
Tests were conducted with 22 dowsers to determine whether they could identify
the objects. Again only chance results were obtained. An experienced dowser
was asked to determine whether water was flowing in a plastic pipe. The
water was randomly turned on or off for 50 trials. No significant results
were obtained. From the report, the tests seem to have been well organized
and well conducted.
Another unsuccessful experiment was conducted by several
members of The American Society for Psychical Research including Laura
Murphy, and Montague Ullman (Dale, Greene, Miles, Murphy, Trefethen,
and Ullman, 1951). Twenty-seven dowsers were taken separately to a small
field near Liberty, Maine and asked to locate the best spot for a well,
estimate the depth, and the flow rate. Pipes were later driven, water level
measured, and the wells were pumped to determine the capacity. A water
engineer and a geologist were asked to estimate depth and flow rate at
several locations (the engineer and geologist knew of a nearby well, the
dowsers did not). The soil was relatively soft, and the water table was
nearly level and close to the surface. The geologist’s and engineer’s predictions
were quite good; the dowsers’ predictions were quite far from the mark.
Because the water table was nearly level over the site, perhaps there were
no distinct subsurface anomalies.
Barrington and Stiles (1973) conducted an investigation
of a commercial divining instrument called the ‘Revealer’. The Revealer
was to be used for locating underground services and was basically a pair
of L-rods. A number of public utilities, engineering companies, and local
authorities had purchased Revealers, and Barrington and Stiles sent them
a questionnaire regarding their use and satisfaction with the instrument.
Most assessments were favourable. Five representatives of organizations
giving favourable replies were selected for field tests. Several different
testing procedures were used, but usually objects were buried in a sand
pit, marked in a fashion to indicate a grid, and dowsers were asked to
the squares in which target objects (two-foot long sections of pipe of
various materials) were buried. Subjects were usually given only 5 to 10
trials. Only one of the five persons tested showed promise. He was subsequently
tested again (under admittedly poor conditions) but did not repeat his
James Randi (1979), professional magician and member of
the Committee for the Scientific Investigation of Claims of the Paranormal,
conducted a test with four dowsers in Italy. Procedures were spelled out
in detail prior to the test and agreed upon by the dowsers. The dowsers
were asked to locate three buried pipes with running water and to place
pegs over the route of the pipes. As stated by Chamberlin (1980), the test
had several deficiencies. No meaningful statistical evaluation was possible.
Even if the dowsers had been quite close, they were unlikely to fulfil
the requirements for a successful test (they were required to place the
pegs in a strip eight inches wide). None of them was able to claim Randi’s
$10,000 reward. The test contributed little knowledge to the scientific
Bryant (1931), Carpenter (1877), Christopher (1970),
MacFayden (1946), Parsons (1959), and West (1948) report unsuccessful tests.
Unfortunately evaluations cannot be made since few details were given or
few trials were conducted. J. W. Gregory (1928) and Sollas (1884) reviewed
a number of tests conducted in the late nineteenth and early twentieth
century; most produced negative results.
Overall, dowsers have performed reasonably well on dowsing
tests purporting to require psi ability. Unfortunately reports are rather
sketchy and some seem to indicate possible sensory cues.
Of the tests reviewed, only three stand out as well conducted—the
map dowsing tests of Cadoret, Osis, and Foulkes. Of these, only one produced
significant results, and that barely significant. It is unknown how many
Journal of the Society for Psychical Research
[Vol. 51, No. 792
well conducted studies have been unsuccessful. Overall, the parapsychological
investigations into dowsing remain inconclusive.
If any additional work is done, it would be advisable to
use map dowsing so that sensory cues could be eliminated (experimenters
should be aware that some maps, topographical ones for instance, might
give relevant sensory information, depending upon the dowsing task). Experimenters
may get better results if definite steps are taken to create a positive
environment and a realistic test situation as suggested by W. H. Jack.
MOVEMENT OF THE ROD
Most dowsing research has been geared to determine how
(and if) the dowser obtains the information he seeks; this has been discussed.
The cause of the dowsing rod’s movement has also been a source of controversy
for some time, but has not received much experimental investigation.
Overall, the prevailing view is that movement of the dowsing
rod is caused by unconscious muscular action. Even the debunkers such as
Gardner (1952/1957), Rawcliffe (1952/1959), and Vogt and Hyman (1959) attribute
it to this, and the last two discuss a number of motor automatisms in their
book. The idea is by no means new; a Jesuit Preist, Father Athanasius Kircher,
suggested this explanation in 1641 (Barrett and Besterman, 1926/1968).
William F. Barrett too was a strong proponent of the theory (cf. Barrett
and Besterman, 1926/1968; Bennett and Barrett, 1897), and his writings
seem to have influenced nearly all other investigators.
Bennett (in Bennett and Barrett, 1897), Glardon
(1898), Hyslop (in Barrett, 1912), and Hyslop (1913) questioned whether
unconscious muscular action could account for every case of the sometimes
spectacular movement of the dowsing rod. A number of anecdotal cases and
the observations of many dowsers tended to throw doubt on this explanation;
although apparently at that time no experimental studies were conducted
to test it. Glardon (1898) suggested that the traditional twig be replaced
by an instrument made so as to preclude the possibility of muscular action
interfering with the operation of the instrument. He suggested the use
of ‘something like a clock or manometer with a steel hand, by means of
which the workings of the unknown force could not only be revealed, but
A recent experiment was conducted by Alvin Kaufman (1971,
1979), an electronics engineer, to test this idea. Kaufman attached one
end of a forked stick to a strain gauge bending beam which could measure
the force in the rod. He held the strain gauge bending beam in one hand
and the other end of the stick with the other. Kaufman found that when
the dowser he tested moved over an underground stream, a very much larger
force was exerted on the rod than could normally be accounted for; and
concluded that dowsing was a promising area in which to study PK. Although
the published report is extremely short and gives few details, it appears
that PK may indeed play a part in some dowsing phenomena.
The Soviet bloc countries have also pursued research in
dowsing for some time. Vasiliev (1965) mentions that such work was done
as early as 1916.
Relatively little has been translated into English, and that which has
contains few details.
Four brief summaries, Ostrander and Schroeder (1971), Bakirov
and Sochevanov (1976), Sochevanov and Matveyev (1976), and Williamson (1979)
indicate that the Soviets approach the subject from a biophysical standpoint.
In fact much of the Russian literature on dowsing uses the term biophysical
effect (BPE). Ostrander and Schroeder present numerous findings and conclusions
of Soviet investigators, but virtually no details are given of experimental
procedure, which devalues the results given. Bakirov and Sochevanov give
a brief history of the recent research and development of dowsing in the
Soviet Union and show that it is being used to find ore deposits. No experimental
details are given; although a 12 item bibliography (all Russian) is included.
Sochevanov and Matveyev record numerous conclusions of various investigators
present at a conference on the subject. Williamson discussed several published
Russian articles indicating that dowsing is used to supplement geophysical
methods: In one region 1,120 wells were said to have been dug on sites
located by dowsers. Again, almost no details were given.
The proceedings of the Second International Congress on
Psychotronic Research included several papers on dowsing. Apostol and Dumitrescu
(1975) presented an abstract on their work. They found that the electric
potential between dowsers’ palms was correlated with a number of variables
such as galvanic skin response, magnetic field, soil temperature, and atmospheric
pressure. They found that the ‘dowsing area’ (an undefined term) was correlated
to geophysical anomalies and that its extent showed a diurnal variation.
Miklos, Moldovan, Kun-Stoicu, and Levin (1975) presented results of a ‘Wedding
Ring Test’ which used a dowsing procedure to determine the sex of an unborn
child. The experimenter held a pendulum (a wedding ring suspended from
a folded hair) over the hand of the expectant mother. The pattern of the
swing was used to predict the sex. Only 15 cases were run under the experimental
conditions; ten successes were obtained, too few for statistical significance.
Boleslav and Boleslav (1970) briefly review the
literature of biological effects of electric and magnetic fields. They
mention, in passing, their own experiments with a coil of wire; showing
that dowsers were sensitive to the field when the coil was vertical but
not when it was horizontal. They claim too that their experiments indicate
that dowsers are sensitive to electromagnetic frequencies in the broadcasting
bands but give no details. They also claim that turbulent or atomized water
emits an unknown undulation that is similar to electromagnetic radiation.
A discussion of this idea ran to several pages but remained obscure.
Naumov and Vilenskaya (1972) produced a bibliography on
parapsychology, including a section on dowsing. The bibliography was quickly
translated and published by the U.S. government. The portion covering the
biophysical effect includes 25 items of apparently scientific work and
27 items of popular literature. Another section deals with the electric
and magnetic fields of living organisms, and a section on foreign work
also lists several studies of dowsing.
Wortz, Bauer, Blackwelder, Eerkens, and Saur (1977, 1979),
employees of AiResearch Manufacturing Company, reviewed the Soviet work
in parapsychology, including dowsing, but concluded that much of that available
suggests a poor understanding of physics and a failure to deal with the
Journal of the Society for Psychical Research
[Vol. 51, No. 792
processes involved. In fact the presentations of dowsing investigations
in the Soviet bloc leave much to be desired. The work translated offers
little more than additional anecdotal material. The actual sophistication
of experimental methodology is vague because the translated reports are
Ray Hyman and Evon Z. Vogt conducted several studies to
determine why water witching was such a widespread and persistent practice.
A portion of their work at Harvard University was supported by the Hodgson
fund. Their findings were presented in their book Water Witching U.S.A.
(reviewed by Levinson, 1959; Parsons, 1960; and Woodruff, 1959) and in
a number of journal articles (e.g. Hyman and Cohen, 1957; Hyman and Vogt,
1958, 1968; Vogt, 1952; and Vogt and Golde, 1958). They assumed that dowsing
is not effective in locating underground water, and cited several studies
supporting this idea, but ignored studies indicating the efficacy of dowsing.
For the major survey, 500 county agricultural extension
agents were questioned about their belief in the effectiveness of dowsing,
the number of dowsers they knew, and the educational level, age, religion,
ethnic background, etc. of the dowsers. The authors concluded that there
were approximately 25,000 dowsers in the United States; that dowsers could
not be distinguished from their community on the bases of religion, ethnic
group, level of education, or occupation; and that the dowsers were reported
to be honest people who made little or no money from practising dowsing.
The highest percentage of dowsers occurred, as expected,
in areas with severe groundwater problems. The investigators claim that
dowsing is a ritual pattern reducing anxiety about the uncertainty of locating
Barrett and Vogt (1969) report a study of urban
dowsers and found some definite differences from their rural counterparts.
The study was conducted by surveying and interviewing members of the American
Society of Dowsers. The urban dowsers had a higher educational level and
most lived in cities of over 50,000 people. They had a strong belief in
ESP and thought it related to dowsing, while the rural dowsers usually
could give no explanation as to why dowsing worked.
In spite of the large number of investigations made into
dowsing, its status remains unclear. This is largely a result of
sloppy experimental procedures and or report writing.
For some people, dowsing does appear to be a useful problem
solving tool. Dowsers do seem to be goal orientated, and in this reviewer’s
experience, most do not care how it works: just as well perhaps, since
science has no definitive answer. Critics and proponents alike should pay
heed to the ideas of a grade school class that studied dowsing (Boone,
1965)—Conclusions should not be drawn on the basis of one experiment.
The biophysical investigations have resulted in a wide
range of findings in regard to human sensitivity to magnetic fields. Well
described reports are available indicating considerable sensitivity as
well as lack of results. If further work is done in this area, rigorous
experimental controls must be applied, and
the site of the experiment should be checked for magnetic anomalies.
If it is found that humans are much more sensitive than previously expected,
parapsychological experiments may require more elaborate shields to rule
out ordinary communication channels.
The physiological studies seem to be the most consistent.
A number of investigators have reported a change in skin potential when
dowsers cross certain ‘dowsing zones’. Although much of this work is 30
years old, it seems to be the most promising area for further study.
As indicated previously, to prove that dowsing is a function
of psi, more successful, strictly controlled tests will be required. In
most of the studies testing this idea, sensory cues w ere not ruled out.
Of the three map dowsing experiments reviewed, one obtained marginally
significant results. Further experiments testing the psi hypothesis should
utilize map dowsing to rule out sensory information to the subject. It
would also be desirable to conduct the testing with a ‘real’ problem.
In short, the work investigating dowsing from a biophysical
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more experimental work is required to support the case that dowsing is
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