The Magician's Own Book, or, the Whole Art of Conjuring / Being a complete hand-book of parlor magic, and containing over one thousand optical, chemical, mechanical, magnetical, and magical experiments, amusing transmutations, astonishing sleights and subtleties, celebrated card deceptions, ingenious tricks with numbers, curious and entertaining puzzles, together with all the most noted tricks of modern performers.

by George Arnold; Frank Cahill

By removing the right hand piece to the side of the left, you thus take away the center without touching it.

31. THE TOPER'S STRATAGEM.

Get a bottle full of water, with the cork driven tightly in, and the top of it level with the neck of the bottle. You must remove the cork from the bottle without touching the cork with anything, and without injuring the bottle.

Wrap a towel round the bottom of the bottle, and strike it evenly and repeatedly, but not too hard, against a wall, post, or tree, and after some time the cork will be driven out of the bottle.

32. THE IMPOSSIBLE OMELET.

Produce some butter, eggs, and other ingredients for making an omelet, together with a frying-pan, in a room where there is a fire, and offer to bet a wager, that the cleverest cook will not be able to make an omelet with them. The wager is won by having previously caused the eggs to be boiled very hard.

33. NEW PERPETUAL ROTARY MOTION.

By an accidental occurrence, it has recently been discovered that a piece of rock-crystal, or quartz, cut in a peculiar form, produces, upon an inclined plane, and without any apparent impetus, an extraordinary rotary motion, which maybe kept up for an indefinite period of time. The curiosity of this philosophical toy having excited general interest in the scientific world, Professor Leslie, in his lecture, thus explains the phenomenon:

"The crystal has six sides, and being cut accurately from the faces to a perfect convex surface, if placed upon a wetted smooth surface, and held parallel, no motion will take place, because the center of gravity of each face is balanced and supported in this position of the plane surface; but if a slight inclination is given to the plane, a rotary motion commences, in consequence of the support being removed from the center of gravity. The impetus once given, the centrifugal force increases the rotary motion to such a degree, as for an observer to be unable to distinguish the form of the crystal.

"To produce the effect.—Place the crystal on a piece of plate or common window glass, a china or glazed plate, or any smooth surface, perfectly clean, as grease or a particle of dust would impede its motion. Wet the surface, and give the plane a slight inclination, when, if properly managed, a rotatory motion will commence, which may be kept up for any length of time by giving alternate inclinations to the plane surface, according to the movements of the crystal; to heighten the pleasing effect of which, a variety of paper figures, harlequins, waltzers, &c., may be attached. The first trial of the experiment had better be made by giving a slight rotatory motion to the crystal."