Note 3 — EXPERIMENTAL INVESTIGATION OF THE SPIRIT MANIFESTATIONS,

There is also this difference, that in Fig. 2 the board is supported by only three wheels, so as to have one in front under the hands of the medium, by which sufficient pressure is secured to make its rotation certain. But as the position thus given does not fall into the plane of the pulley at the back of the disk, the wheel in question is supported upon an axle which is secured in staples or holes, and carries a pulley just at the position where it is coincident with the plane aforesaid. The wheel is visible in front.