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Professor of engineering at the University of Michigan. Photos of Johnston's personal and family life in Wyoming and Michigan, including student activities at the University of Michigan; photos of his work on water projects in the West and in Egypt; and photos of Camp Davis, the summer engineering camp of the University of Michigan in Cheboygan Co., Michigan..

The Johnston collection spans the years of 1888-1928. The bulk of the collection is comprised of photographic prints, mainly cyanotypes, and glass plate negatives. Scattered papers are also present and include biographical material and topical files relating to Johnston's personal, religious, and professional activities. The collection has been arranged into five series, which include: Personal and Family Photographs, Work Photographs, Camp Davis Photographs, Glass negatives, and Biographical Materials.

Ann Arbor, Michigan based hydraulic engineer known for his multiple arch dams, hydroelectric plants, and for developing the Hazen-Williams hydraulic tables, designed and consulted on numerous water power and dam projects. Papers include biographical files, material relating to construction of dams and power plants on the Huron River and elsewhere, and papers relating to Michigan Engineering Society.

The papers of Gardner Williams, 1900-1931, include biographical material; papers relating to the history of Michigan Engineering Society; project files detailing construction of Huron River power plants and dams at Argo, Barton, Geddes, Superior, and French Landing; other Michigan project files for dams and plants in Sault Ste. Marie and elsewhere; Detroit Edison consultation materials; engineering reports by, or including comments of, Williams; and photographs.

The Williams papers came from the offices of Ayres, Lewis, Norris and May, Ann Arbor engineering firm. Obviously a fragment, they cover only the period of 1900 to 1931, with photographs spanning the dates 1900 to 1945.

The collection begins with a folder of biographical material and a folder regarding the history of the Michigan Engineering Society. Except for these, the collection divides into four series: Power Plants and Dams, the Detroit Edison Company, Engineering Reports, and Photographs.