Blōw'-pīpe, n.

n. [blow and pipe.] An instrument by which a blast or current of air is driven through the flame of a lamp or candle, so as to direct the flame and concentrate the heat on some object.

☞— It is called a mouth blow-pipe when used with the mouth; but for both chemical and industrial purposes, it is often worked by a bellows or other contrivance. The common mouth blow-pipe is a tapering tube with a very small orifice at the end to be inserted in the flame. The oxy-hydrogen blow-pipe invented by Dr. Hare in 1801, is an instrument in which oxygen and hydrogen, taken from separate reservoirs, in the proportions requisite to form water, are used in place of common air. It gives a heat that will consume the diamond, and dissipate in vapor, or in gaseous forms, most known substances. Silliman.