“ NEW FORCE ” OF M. J. THORE. 
453 
the observer ; this seems to indicate that the origin of this force is in the observer 
himself. If so, what is its nature ? ” 
Rough preliminary experiments having enabled me to verify the broad facts of 
rotation as described by M. Thore, I fitted up a more accurate apparatus (fig. 3), 
consisting of a glass case, ABCDEF, six-and-a-half inches square and seven inches 
high, with a rising glass window, ABGH, in front, and similar windows at the sides. 
The top is of card, in the centre of which is a small hole. The cylinder, I, is suspended 
Fig- 3. 
in the middle of the case by a very fine cocoon silk fibre, 5 feet long, surrounded by a 
card tube, J, attached to the top of the glass box. K is a second cylinder attached to 
a support, LM, by a ball-and-socket joint for convenience of adjustment. The support, 
M, projects outside the case to admit of the second cylinder (which I shall call the 
pillar) being brought close to the suspended cylinder (which, for distinction, I shall call 
simply the cylinder) and transposed from one side to the other, &c., without opening 
the windows of the box. N is a cord attached to the front glass window, weighted 
