Note 3 — HOME STUDIES IN CHEMISTRY AND PHYSICS.
Reading edition
“Babcock’s Fire Extinguisher.” This instrument consists of an iron cylinder, in which are placed suitable quantities of the materials that, uniting, generate carbonic acid gas. There is an arrangement in the extinguisher by which the materials are brought in contact, and the gas when needed is instantly generated; as provision is made for its egress a stream can be poured on the flame to extinguish it.