Note:  Do not rely on this information. It is very old.

Bunsen Burner

Bunsen Burner consists of a small gas jet, above which is screwed a brass tube, at the bottom of which are holes to admit air. The air and gas mix together in the tube, and burn at the top with a flame which should be perfectly non-luminous. It is largely used in chemical operations, as it gives greater heat than an ordinary gas flame, and leaves no sooty deposit on objects placed in it.