Cut a circular piece of gold leaf, called "dentists' gold," about half an inch in diameter; drop upon it a globule of mercury, about the size of a small pea, and if they be left for a short time, the gold will lose its solidity and yellow color, and the mercury its liquid form, making a soft mass of the color of mercury.
MAGIC BREATH.
Half fill a glass tumbler with lime-water; breathe into it frequently, at the same time stirring it with a piece of glass. The fluid, which before was perfectly transparent, will presently become quite white, and if allowed to remain at rest, real chalk will be deposited.
TWO BITTERS MAKE A SWEET.
It has been discovered, that a mixture of nitrate of silver with hyposulphate of soda, both of which are remarkably bitter, will produce the sweetest known substance.
VISIBLE AND INVISIBLE.
Write with French chalk on a looking-glass; wipe it with a handkerchief, and the lines will disappear; breathe on it, and they will reappear. This alternation will take place for a great number of times, and after the lapse of a considerable period.
TO FORM A LIQUID FROM TWO SOLIDS.
Rub together in a Wedgewood mortar a small quantity of sulphate of soda and acetate of lead, and as they mix they will become liquid.
Carbonate of ammonia and sulphate of copper, previously reduced to powder separately, will also, when mixed, become liquid, and acquire a most splendid blue color.