The reality of psychic phenomena : raps, levitations, etc. (1916)
Crawford, W. J. (William Jackson), 1880-1920, Harry Houdini Collection (Library of Congress) DLC · London : John M. Watkins · leaf 102
than X, the water rises in the left-hand limb ABOVE, UNDER, AND ROUND TABLE 89 of the U-tube and falls in the right-hand one,and the difference of heights is a measure of thedifference of pressure. The length of the tube Cwas 14|^ in. Fig. 7 shows the elements of theapparatus only. As a matter of… … Fig. 7. can be held at any instant, and thus the differencein heights of the columns of water examined atleisure. If we suppose that there is a uniform upwardpressure of 025 lb. per sq. in. under the table,and if we further suppose that this pressure isexerted by something of the nature of a gas,…
Parapsychology · Spiritualism
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