Collections

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.

Letters from relatives in New York, New Jersey and Iowa discussing in part plans to migrate westward; letter, 1852, recounting missionary life in India; Civil War letters from Townsend M. Luce (Co. F., Third Michigan Infantry), Rufus Cheney (Co. D, 2nd Michigan Cavalry), Charles O. Reed (probably Co. A, 4th Michigan Cavalry), Philip Segur (Co. A, 7th Michigan Cavalry), and one tentatively identified as Albert H. Freeman (Battery B, 1st Michigan Light Artillery); and miscellanea.

Physicist, University of Michigan professor, dean of the graduate school; correspondence, writings, speeches, organizational files, audio-visual materials.

Although the Ralph A. Sawyer collection includes materials relating to all phases of his career, beginning with his studies at the University of Chicago in 1918-1919, the strength of the files are for those activities outside of the University of Michigan, notably his work with the U.S. Navy laboratories, Joint Task Force One, the American Institute of Physics, and the Optical Society of America. Files dealing with his University of Michigan activities are less complete as these materials will be found with the records of those units which Sawyer headed.