VOL. 5. No. 1
ME~HANICALCHEMISTS
AN EFFICIENT AND ECONOMICAL HYDROGEN SULFIDE GENERATOR
When compressed hydrogen sulfide is not available, the gas is usually supplied either from an apparatus such as a Parsons' generator or from Kipps. The use of either of these has its dis.. advantages, particularly with large classes. The individual gas generator suggested by the writer has been found, after a year's trial, both efficient and economical, besides eliminating delays which were unavoidable when the hydrogen sulfide was in constant demand. (See Fig.) The acid is dropped in from A , while the gas escapes through B. The means by which the acid is supplied prevents an unnecessary excess being added. The waste liquor is removed by pinching the rubber tube on one side of the glass bead a t C. D is a piece of glass tubing about seven-eighths of an inch in diameter and three inches long, and is fitted a t both ends with rubber stoppers.
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