Occasionally the burner should be allowed to boil in a little soda water; it can then be easily rubbed clean, and dried with a soft cloth in front of the fire before use. Now and then the reservoir should be filled with a little hot water and soda; but it must be well dried before any oil is put in, as any water left would make the light flare up.

The smell of a lamp is often due to the oil remaining on the surface, and not being properly wiped off.

Should a lamp be upset, and the oil set on fire, never throw water on it, as this only acts as an agent for floating the burning oil from place to place, and thus adds to the danger; the flames should be smothered by a heavy rug or mat, wet earth, or damp sand.

Lighting A Lamp

For this purpose a match or taper should be used - not paper, lest the ash fall on the wick and make the flame uneven. The light should not be turned on full for a minute, to allow of the gradual expansion by heat of the glass, when the cloudiness on the chimney-caused by the damp air inside - has passed off. It is a mistake to believe it an economy to keep a lamp turned down low, as quite as much oil is consumed, and an unpleasant smell is the only result.

To Extinguish A Lamp

Where there is no patent extinguishing arrangement it must be remembered that blowing down the chimney leads to pernicious results; the wick should be turned low, and one sharp puff be given across the top of the chimney. Another method is simply to lower the wick, and to place a circular piece of metal over the top of the chimney.

Colza Oil

This vegetable oil is very rarely used now, as owing to its viscid nature, and the difficulty in forcing it to ascend the wick, a special variety of lamp is necessary.

SPONGE OR SPIRIT LAMPS are also unpopular. The container is filled with sponge or cotton wool, which is moistened with benzoline; a very small flame results. The benzoline being highly inflammable, great care is necessary.

A useful little lamp giving a small light for a landing, backstairs, etc., is the "Little Mannikin, price about 1/-. It burns 150 hours at a cost of 1d., and being weighted, it cannot be upset.

The symphelite spirit lamps, costing from 1/- to 1/6, for boiling a kettle, are exceedingly safe and portable, as the methylated spirit is absorbed, and consequently there is no free spirit to escape. The petrolite lamp also has a reservoir containing an absorbent block of kieselguhr and plaster of Paris which is soaked in petrol, and the vapour arising from it is consumed in a Bunsen burner. If the lamp is overturned, the light immediately goes out, there being no free liquid in the reservoir.

The Blanchard lamp, whilst having 500 candle-power, consumes but 1 gallon of oil in 32 hours, which bought in large quantities at 6d. per gallon reduces the cost of the use of the lamp to 3/16 of a penny per hour-1200 candle-power is obtained for 1\2d. an hour, or 100 candle-power at the rate of 16 hours for one penny. The heat necessary to vaporize the oil for the lighting of the lamp is derived from the ignition of a small quantity of methylated spirit beneath the burner. Afterwards the required heat is supplied by.the combustion of the oil in the burner. A pump is fitted to the container for supplying the air pressure, which forces the oil from the container to the burner. Bracket lamps of this make are to be bought for 2 16s., while table lamps of polished brass cost 3 16s. With these lamps there is no smoke, smell, or danger of explosion, and an excellent light is produced, which can compete successfully with the most up-to-date and advanced incandescent gas or electric lighting.

One can truly say that they represent the triumph of oil; and they cannot be too highly recommended.