The jet of air is regulated by a small cock, and the most surprising thing is the small supply of air which is found requisible to producethis large and vivd light, and to consume the smoke so perfectly that there is no smell from it. We subjoin a little sketch, sufficient to give a general idea of the thing ; but the lamp can be so easily seen at the factory of Mr. Beale, that we do not think it necessary to explain the move of suspending or regulating the supply of tar, or the relative size of the different parts.

The flame rises about 6 inches above the top of the inverted cup, and is more brilliant than a gas light. We conceive that it will be very beneficial to the poor, for such a flame would be quite sufficient to boil a saucepan or tea-kettle, and for 2/3 : of the year would render fire innecessary in a cottage. [...] is calculated that one horse power applied to an air-pump or bellows, would produce sufficient blast of air for the supply of two or three thousand lights ; but in detached cottages, a small bellows worked by the foot, or by a child, would supply the air necessary. A quart of coal-tar

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