This recreation may be considerably improved by placing the two glasses in the wainscot in adjoining rooms, and a number of persons being previously placed in one room, when a stranger enters the other, you may tell him his face is dirty, and desire him to look in the glass, which he will naturally do; and on seeing a strange face he will draw back; but returning to it, and seeing another, another, and another, what his surprise will be is more easy to conceive than express.
When one looks in a mirror placed perpendicularly to another, his face will appear entirely deformed. If the mirror be a little inclined, so as to make an angle of eighty degrees (that is, one-ninth part from the perpendicular), he will then see all the parts of his face, except the nose and forehead; if it be inclined to sixty degrees (that is, one-third part), he will appear with three noses and six eyes; in short, the apparent deformity will vary at each degree of inclination; and when the glass comes to forty-five degrees (that is, half-way down), the face will vanish. If, instead of placing the two mirrors in this situation, they are so disposed that their junction may be vertical, their different inclinations will produce other effects; as the situation of the object relative to these mirrors is quite different.
The Disappearing Paper.
Attach to a dark wall a round piece of paper an inch or two in diameter, and, a little lower, at the distance of two feet on each side, make two marks; then place yourself directly opposite to the paper, and hold the end of your finger before your face in such a manner, that when the right eye is open, it shall conceal the mark on the left, and, when the left eye is open, the mark on the right; if you then look with both eyes to the end of your finger, the paper, which is not at all concealed by it from either of your eyes, will, nevertheless, disappear.
Multiplied Money.
Take a large drinking-glass, of a conical form, that is, small at bottom and wide at top, and, having put into it a dime, let it be half filled with water; then place a plate upon the top of the glass, and turn it quickly over, that the water may not get out; a piece of silver as large as half a dollar will immediately appear on the plate, and somewhat higher up another piece of the size of a dime.