"A board, being about four feet in length, is supported by a rod, as a fulcrum, at about one foot from one end, and, of course, three feet from the other, which is suspended on a spring balance. A glass vase, about nine inches in diameter and five inches in hight, having a knob to hold it by, when inverted had this knob inserted in a hole made in the board six inches, nearly, from the fulcrum. Thus the vase rested on the board mouth upward. A wire-gauze cage, such as is used to keep flies from sugar, was so arranged by a well-known means as to slide up or down on two iron rods, one on each side of the trestle supporting the fulcrum. By these arrangements it was so adjusted as to descend into the vase until within an inch and a half of the bottom, while the inferiority of its dimensions prevented it from coming elsewhere within an inch of the parietes of the vase. Water was poured into the vase so as to rise into the cage till within about an inch and an half of the brim. A well-known medium (Gordon) was induced to plunge his hands, clasped together, to the bottom of the cage, holding them perfectly still. As soon as those conditions were attained, the apparatus being untouched by any one excepting the medium as described, I invoked the aid of my spirit friends. A downward force was repeatedly exerted upon the end of the board appended to the balance, equal to three pounds' weight nearly;... the distance of the hook of the balance from the fulcrum on which the board turned was six times as great as the cage in which the hands were situated. Consequently a force of 3×6=18 pounds must have been exerted." The above experiment was performed in Dr. Hare's own laboratory, in the presence and under the watchful scrutiny of John M. Kennedy, Esq., and was made with extraordinary care, because Professor Henry had just treated a similar result formerly obtained as incredible. Plate III. in the book furnishes a diagram illustrating Dr. Hare's apparatus. This experimenter, whom Alfred R. Wallace calls America's foremost chemist, had spent very many years in both constructing and in using, as a scientist, varied kinds of apparatus for testing the presence and action of subtile forces in nature, and he was competent to know, and did know as well as any other man whatsoever in the world's great body of scientists, when results were obtained to positive certainty. He _proved_ that some invisible and intelligent power moved his scale-beam contrary to the action of gravitation. The above demonstration, accompanied by many other evidences of spirit-action upon matter through mediums, had been published twelve years when Upham put forth his work. Therefore he was either ignorant of or he ignored late discoveries of science which had revolutionizing applicability to the very theories which he was putting forth.