174. I next resorted to an apparatus like the plaything called a see-saw, excepting that the fulcrum, instead of being under the middle of the board, was situated at one-fourth of the whole length from one end. There was one foot on one side of the fulcrum, and three feet on the other. The disk and its axle was transferred from the table, Plate I, near to the longer end of this seesaw-like apparatus. The cord attached to two weights was employed as above described, so that as the disk was made to rise or fall with the vibration of the board by the action of the cord, a revolution took place, bringing the letters successively under the index, as already explained to have resulted from the movements of the table. 175. The disk being situated edgewise to the medium, the letters could not be seen. Under these circumstances, the hands of the medium were placed upon the surface of the smaller portion of the board outside of the fulcrum. The disk revolved to and fro, so as to bring the letters under the index in due alphabetic order. Moreover, while this process was under way, to render the result more unquestionable, I interposed a screen between the disk, and the eyes of the medium, without causing any arrestation of the process.[8] 176. Afterward upon the table supported on wheels or castors, and moving the disk by a band, I used a tray on castors to support the hand of the medium. 177. When the hands of the medium, or those of any other operator, were placed upon this tray, it was impossible to move the table by means of it, because much less force would make it move on its castors than would move the table. Sometimes the tray would be moved backward and forward with rapidity, the table remaining quite still. Yet, on urging that the table should be moved, this desideratum would be conceded, and the tray would become stationary, relatively, to the table. On one occasion, when an intelligent spirit was manifesting, I interposed a brass ball (Plate I.) and plate between the tray and the hands of the medium, and then requested that the tray might be moved. My request was obeyed; the tray moved repeatedly about a foot to and fro, accompanied by the hand of the medium, the ball remaining at rest, relatively, to the tray. 178. Having my apparatus at the residence of the lady by whom it had been actuated in the third trial above mentioned, (172) this lady sitting at the table as a medium, my sister reported herself. As a test question, I inquired “What was the name of a partner in business, of my father, who, when he had left the city with the Americans during the Revolutionary war, came out with the British, and took care of the joint property?” The disk revolved successively to letters correctly indicating the name to be Warren. I then inquired the name of the partner of my English grandfather, who died in London more than seventy years ago. The true name was given by the same process.