their objectivity or subjectivity in any particular
case. Numerous experiments might be tried, such as crystal-gazing,
automatic writing, seances, induced dreams, etc. Experiments should be
tried in photographing the apparitions, and in getting them to register
their presence upon delicate and sensitive instruments of all sorts.
Phonographic records of the "footsteps" of the ghost (if such occur)
should be made, and a record taken of all the sounds and noises which
occur in the house. Clairvoyants should be sent on "trips" to ascertain
the character of the haunting, if possible, in order to "check off"
their descriptions against the experiences of those living in the house.
Communication should be established with the "haunting spirits," if
possible, by means of raps, table-tipping, etc. The character of the
phenomena should be studied, and the _physical_ separated from the
_mental_. The nature of the intelligence "haunting" the house should be
investigated psychologically. The dreams of those who sleep in the house
should be recorded and analysed. Animals should be taken to live in the
house, to see whether or not they perceive anything unusual. The effect
of suggestion, exorcism, etc., should be tried and noted. Experiments in
hypnotism, "magnetism," etc., should be conducted in the house. Red
lights and lights of other colours should be tried, to see whether they
affect the phenomena in any manner. These are but a few of the many
tests and experiments that might be made, and which would doubtless
suggest themselves to the mind of the investigator as soon as the
legitimacy of the subject were once granted.

Again, in the case of telepathy. Once the facts were proved, the
fascinating study of the laws and causes would begin. Under what mental,
physical, and, possibly, spiritual conditions does telepathy operate?
What is the best mental condition of the agent? of the percipient? What
would be the effect of hypnotic trance? What of dreams? (These are not
original ideas, but they have never been followed out as they should be,
and might be, if the subject were pursued scientifically as other
questions in science are.) Again, might not telepathy be facilitated if
we chose individuals of the same general temperament? If we chose two
individuals to whom the same chord on the piano appealed (say the common
chord of G minor or C sharp), and this chord were struck repeatedly,
might not telepathic transmission be facilitated unde