Albert L. Genter was a chemical engineer working in Baltimore, MD during the 1930s. The collection consists of one laboratory diary kept by Albert L. Genter, 1932-1933, while he was formulating a process for sludge conditioning at the Back River Sewage Disposal Plant in Baltimore, MD.

Lloyd Logan was a chimst and Johns Hopkins professor born in Nova Scotia in 1890. The collection consists of material relating to Lloyd Logan's days as a student at Johns Hopkins, his service in World War I, and his research and patents spanning 1918-1939.

W.W. Holland was an industrial chemist and Hopkins researcher. Collection deals largely with Holland's work (1930-1934) on the Gyro process of cracking petroleum to produce gasoline. Includes research data, reports, correspondence, and printed material.

Walter Albert Patrick was a chemist whose research focused on devising a quick and cheap method of making silica gel, a desiccant, in large quantities. This collection consists of research, correspondence, typescripts, student papers, and publications from 1901-1968.