PHOSPHORIC FIRE-BOTTLE.--Take a common brimstone match, introduce its point into a bottle containing oxide of phosphorus so as to cause a minute quantity of it to adhere to it; if the match be then rubbed on a common bottle cork, it instantly takes fire; care should be taken not to use the same match immediately, or while still hot, as it would inevitably set fire to the oxide of phosphorus in the bottle. The phosphoric fire-bottle may be prepared in the following manner: Take a small phial of very thin glass, heat it gradually in a ladleful of sand, and introduce into it a few grains of phosphorus; let the phial be then left undisturbed for a few minutes, and proceed in this manner until the phial is full; or, put a little phosphorus into a small phial; heat the phial in a ladleful of sand, and when the phosphorus is melted, turn it round, so that the phosphorus may adhere to the sides of the phial; and then cork the phial closely. * * * * * A COMBUSTIBLE BODY SET ON FIRE BY WATER.--Fill a saucer nearly full of water, and drop into it a small piece of potassium the size of a pepper-corn (about two grains); the potassium will instantly become red-hot and dart from one side of the saucer to the other, and burn vividly on the surface of the water. * * * * * CURIOUS EXPERIMENT.--Procure three basins, and put water of the temperature of thirty-three degrees into one basin, of fifty degrees into another, and of a hundred degrees into the third; then plunge one hand into the water of thirty-three degrees, and the other into that of a hundred degrees, and when they have both remained a few seconds, withdraw them, and plunge both hands into the water of fifty degrees: the one which was before in warm water will now feel cold, and the one that was in the cold water will feel warm. * * * * * VIVID PRODUCTION OF FIRE.--Take three parts by weight of flowers of sulphur, and eight parts of copper filings, mix them intimately together, and put the mixture into a large test-tube, or small glass matrass. If the tube be now placed upon red-hot coals, the mass begins to swell, and a small ignited spark becomes first visible at the bottom, which rapidly increases in size, and lastly, the whole mass glows and exhibits a brilliant combustion without the access of air or oxygen gas. * * * * * THE FIERY FLASH.--Pour iron filings upon the flame of a candle, from a sheet of paper, about eight or ten inches above it; as they descend into the flame, they will enter into a very vivid scintillating combustion. * * * * * SPIRITS OF WINE.--Put a small quantity of spirits of wine into a glass, and put a halfpenny or shilling in with it; then direct the rays of the sun, by means of a burning glass, upon the coin, and in a short time it will become so hot as to inflame the spirits. Enigmas.