Steam bath

A steam bath is often used to heat solutions that boil below about 90°C, or to heat a mixture to approximately 100°C. The laboratories are supplied with steam from a central boiler and in this case use of the steam bath eliminates the hazards of a flame. Connect the steam line to the top inlet on the bath. The bottom inlet is attached to a hose, which drains into the sink. Any water that condenses in the bath while you're using it will drain out. Usually, steam baths have concentric rings as covers. You can control the "size" of the bath by adding or removing rings. [chem.wisc.edu/areas/organic/orglab/tech/heating.htm]