Incubator
a piece of apparatus in which a constant, predetermined temperature may be maintained. Its principal scientific use is for the growth of bacterial culture. It is frequently a double box of copper or other metal insulated with miner wool or felt. The space between the walls is usually filled with water, making it in effect a water INDEPENDENCE bath. The source of heat is generally a Bunsen burner, although in some cases electric coils have been used. An adjustable thermostat which operates on the gas flow, is used to control the temperature. The temperature desired, and the type of work for which the apparatus is to be used, largely determine the design, but it is usual to provide a heavily insulated glass door, in order that the condition of the contents may be observed from time to time. See INCUBATION.