The manufacture and chemistry of candles have already been so fully described in "Domestic Science," that we have little more to add respecting them, except that tallow candles are the better for keeping, and that winter-made candles last longer than those made in the summer. Prices of all kinds vary very much. They are chiefly:

Wax.

Sperm.

Belmontine. Price's.

Field's Ozokerit. Dips (tallow).

Rock candles and half-hour candles, 1s. per box of 60, useful for timing the going to bed of servants and children.

Ozokerit candles are the last novelty. Ozokerit is from the Greek ozo "I smell of" - keros, "wax." It is a vegetable wax, and in its raw and native state is of a yellowish colour, of light specific gravity, and somewhat fibrous in its structure. It will not burn of itself, but will readily melt on a light being applied to it. On being roughly wrapped around a centre, even in its native state, it easily and readily consumes. In fact, a rude candle can be made of the raw material and a cotton wick. It is found principally in Austria, Moldavia, the Caucasus, and near the Caspian Sea, where it is obtained in great quantities, being largely used in those countries for illuminating purposes. It was discovered, about two years since, by a Russian military officer, who communicated the fact to M. Gustav Siemssen, who has introduced it into England. These candles are much liked, as they remain hard at a high temperature.

Wax candles which have turned yellow may be whitened by rubbing them with a spong dipped in a little spirits of wine.

Savealls are used by all economical people for burning up ends of candles and saving waste.