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This substance is obtained by a chemical process similar to that employed for precipitating complex proteids, and is called a "ferment" by the writer. We give his conclusions : The substance is readily soluble in water and glycerine, but not in ether or alcohol, though the latter do not destroy its action. Its power is not affected by weak alkalies, but is by carbolic and hydrochloric acid. Its properties are destroy¬ ed by the digestive juices, and by heating to 45o C. The substance hasdoi:10.1001/jama.1891.02410790048006 fatcat:pm3bkqlh4rgp5kidqrnuuzifbq