aper in front, and there will be as many images of flames thrown
through the hole and upon the paper as there are burning candles.

[Illustration: THE MAGIC APERTURE.]

GREEN FIRE.

Obtain some boracic acid, mix it well with a small quantity of spirits
of wine, or alcohol, place the alcohol in a saucer upon a dish, and then
ignite it with a match. The flame will be a beautiful green. To see the
color to perfection, of course, the room should be somewhat darkened.

A green flame may also be produced by using chloride of copper instead
of boracic acid. And instead of mixing it with the alcohol, a small
quantity may be imbedded in the wick of a candle.

A BEAUTIFUL IMITATION OF HOAR FROST.

Obtain a large bell-glass, with a short neck and cork at the top, such
as may be seen in the chemists' shops. Then procure a small quantity of
benzoic acid, which exists in the shape of snowy crystals. Elevate the
bell-glass upon a little stage made of books or pieces of wood, so as to
allow a spirit-lamp to be introduced underneath, and a little
evaporating dish to be held above the flame by means of a ring of wire
with suitable handle. Place the benzoic acid in the evaporating dish,
over the flame, and presently the acid will ascend in vapor and fill the
bell, which must not be quite closed at the top. Before setting up the
apparatus, introduce into the bell a small branch of foliage, which may
be hung by a thread from the neck of the bell. The stiffer and more
delicate this branch, the better. In a short time, it will become
covered with a soft white deposit of the acid, very closely resembling
hoar-frost. This makes an extremely pretty ornament for the parlor.

[Illustration: IMITATING HOAR-FROST.]

TO BOIL WATER WITHOUT FIRE.

Half fill a common oil-flask with water, and boil it for a few minutes
over the flame of a spirit-lamp. While boiling, cork up the mouth of the
flask as quickly as you can, and tie a bit of wet bladder over the cork,
so as to exclude the air perfectly. The flask being now removed from the
lamp, the boiling ceases. Pour some cold water upon the upper portion of
the flask, and the ebullition recommences! Apply hot water, and it
stops! And thus you may go on as long as you please.

TO CONVERT A LIQUID INTO A SOLID.

Dissolve about half a pound of sulphate of soda in a pint of boiling
water, and after it has stood a few minutes to settle, pour it off into
a clean glass vessel. Pour a little sw