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Papers of David M. Dennison, professor of physics at the University of Michigan; contain lecture notes and exam materials, correspondence, speeches, files relating to research in theoretical physics, University of Michigan and travel files.

The David M. Dennison Papers contain both the personal correspondence of the Dennison family and items relating to David M. Dennison's research and teaching while at the University of Michigan.

The first part of the collection is correspondence from 1894-1896 from James Lutheran Dennison and his wife to their son Walter Dennison, the father of David M. Dennison. One folder contains correspondence from George Dennison and his wife Nina to his brother Walter Dennison also from the 1890s.

Biographical and personal materials for David M Dennison are comprised of letters from David M. Dennison and his wife, Helen Lenette Johnson, memorial materials from David's death, home finances, and travel information. Family documents in this collection are comprised mostly of his son Edwin's Ph.D. research at the University of Michigan. Dennison's papers include various speeches, articles, and other writings about the physics he was studying, primarily focused on the later part of Dennison's time at the University. Materials from the University of Michigan include lecture notes and exams from the many physics classes Dennison taught. Documents relating to administration of the physics department and David's colleagues are also a part of this collection. Of note is David and Helen's correspondence and connection to the Niels Bohr Institute.

Audio-visual materials in the collection include photographs of David and Helen from the early 1900s through the 1970s. There are also two cassette tapes with recording of talks given by David, as well as photograph negatives and spectroscopic plates, lantern slides depicting astronomical images pertaining to his astro-physics research.

Photographs collected from various sources, depicting buildings, faculty, students, and other topics relating to the University of Michigan.

The University of Michigan Photographs Vertical File represents a miscellaneous assemblage of U of M-related photographs from many different sources, mainly prior to 1950. The vertical file is especially strong on the earliest photographic images of the campus, university buildings, and class activities. While the vertical file contains many images of individuals, researchers should first consult the library's on-line catalog for images of faculty, administrators, and other University personalities. Most photographs originally accumulated by a University department or other unit are kept with that unit's records.

The arrangement of the photographic images was intended to parallel the classification used with University of Michigan published materials and with manuscript materials. Both of these used a classification system using letters of the alphabet (A through N only) for groupings of published or manuscript material. This system was carried over for use with the library's photographic images though there are certain categories for which images are unlikely to be found (Category A, for example, which pertains to legislation affecting the University or Category I which is reserved for university publications of a scientific or literary nature). The classification is further broken down under each letter by a number code which refers to a more specific subdivision. The heaviest concentration of images will be found under C (for U-M schools and colleges, departments, and other units), D (for university buildings and views), and F (for class pictures, photos of student organizations, and images detailing aspects of student life and customs).

Each heading in this finding aid includes the letter classification plus a numbered subdivision. In addition, the individual envelopes are numbered sequentially. Headings for which there are oversized images (usually larger than 8x10) will be indicated by reference to medium or large size photographs. When requesting material, researchers must specify the heading and the classification and folder number.

This finding aid describes only a small portion of the Bentley Library's U-M visual images. The on-line catalog will direct the researcher to additional images.