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Photographs (positive and negative), slides, and transparencies taken by the company's photographers to document company activities, products, services, employees at work and at leisure, company exhibits and commemorations, and the response of the company to natural disasters and civil disturbances.

In 1993, Michigan Bell as a corporate entity was subsumed within the Ameritech Corporation. As a by-product of this reorganization and the downsizing resulting from it, the company agreed to deposit with the Bentley Historical Library its extensive archive of photographic images. Totalling approximately one million images, the Michigan Bell Telephone Company photo archive consists of negatives, copy prints, and color transparencies taken in the period since World War II (the bulk beginning in 1949). The collection does not include photos taken since 1983; interspersed throughout, however, are numerous images from before 1949.

The collection has been maintained in the order received with two principal series: Positives and Negatives.

The content of the photographs in the two series varies considerably. Naturally the collection documents the products of the company (phones and other communication devices) and the services provided (e.g. employees at work or the company reacting to a specific customer need). These photos were taken both to inform the general public as accompaniment to press notices and advertising copy and as a communications vehicle within the company, informing employees through the company news publication, Tielines, of activities going on in other divisions of the company or among the various regional Bell offices.

More importantly perhaps, the collection has value for its documentation of events and activities that are common to all large companies. These include images relating to: 1. The activities of employees within the corporation at their work (office workers, repairmen, operators, various support personnel, managers, etc.); 2. The activities of employees outside their work routine as members of corporate social groups (i.e., the company baseball or ice hockey team), at home engaged in leisure time activities, or involved in company-sponsored charitable or public service functions; and 3. Commemorations of specific milestones or events (company parade floats, area office open houses, corporate displays at public events such as fairs, etc.).

In addition, the collection documents the extraordinary and unforeseen as the phone company reacts to events and emergencies not within its control (floods, tornadoes, fires, the 1967 Detroit riot, strikes, and the like) or as a participant in history-making events (the announcement in Ann Arbor of the success of the Salk polio vaccine or the preparation involved in the 1980 Republican National Convention that convened in Detroit).

Dean of the College of Engineering of the University of Michigan; correspondence, letter books, appraisals and reports, lectures, blueprints, newspaper clippings, photographs, and other materials concerning his activities as dean of the College of Engineering, engineer for the U.S.S. Yosemite in the Spanish American War, chairman of the Block Signal and Train Control Board, Democratic candidate for the U.S. Senate in 1924, and coordinator for the P.W.A. in Michigan in 1933-1935; also genealogical materials on the Cooley family.

The Mortimer E. Cooley papers consists of correspondence, subject files, personal materials, and photographs detailing the professional career and activities of a distinguished engineering educator. The collection has been arranged into the following series: Correspondence; Topical Files; University of Michigan and College of Engineering materials; Genealogical and Miscellaneous; Arbitration, appraisal, and consultation files; Photographs; Naval Logs; and Testimonial and celebratory materials. Box 47 was eliminated during 2001 reprocessing.

Burroughs was assistant director of the Engineering Research Institute, later director of its successor organization, the Research Institute [reorganized in 1961 as the Office of Research Administration (ORA)] of the University of Michigan. Papers includes topical files, correspondence, ORA executive committee minutes, and reports and proceedings of the National Conference on the Administration of Research (NCAR)

The collection is arranged into four series, reflecting Burroughs' various profession engagements at the University of Michigan and other institutions: Topical files, Correspondence, Committee Minutes, and Office of Research Administration

Graduate of the College of Engineering of the University of Michigan in the class of 1911, later Detroit businessman. Papers and photographs relating to student life and activities.

The collection consists of programs and newspaper clippings largely concerning student life at the University of Michigan. The photographs are portraits and snapshots of Taylor, family members and friends; photographs of the construction of Barton Dam in Ann Arbor, Michigan; photographs of University of Michigan student surveying projects; and photographs of University of Michigan students, groups, and activities. In addition, there is an arithmetic notebook, 1833, of H. Green, student at the Detroit Academy. This item was probably collected by Taylor or perhaps in the possession of a family member.

Professor of civil engineering and specialist in soil mechanics at the University of Michigan. Correspondence, daily logs of activities, class materials, conference and lecture files, and professional reports and soil investigation studies; and photographs.

The Housel papers include correspondence, newspaper clippings, lectures, conference materials, class materials, and various reports and studies of soil investigations. Of interest is a series of daily logs kept by Housel in the period 1962-1968 and which concern some of his consulting projects.