Collections : [University of Michigan Bentley Historical Library]

Mathematician, professor of mathematics at the University of Michigan. Correspondence and other papers relating to professional and family matters, to his association with the Bethlehem Church in Ann Arbor, and to his involvement with the American Mathematical Society, especially regarding the controversy over loyalty oaths in the 1950s; also letters from family members, notably sister Martha, a school teacher, who comments on her career and her life as a single woman; and letters from son Paul during World War II; and photographs.

The papers of T.H. Hildebrandt consist of seven linear feet of materials spanning the years 1887 to 1978. The bulk of the collection falls between the years 1930 and 1960. The papers have been arranged in ten series: Biographical Material, Bethlehem Church, Compositions, Correspondence, Lectures, Notes, Organizations, Universities, Writings, and Visual Materials.

As Hildebrandt was fairly well known in his field, he corresponded with other eminent mathematicians of his time, including Eliakim Hostings Moore (with whom he had studied) and Maurice Frechet. The Hildebrandt papers are also valuable for other topics: the development of mathematical ideas and the various pressures placed on academics during the Cold War to name both two examples.

Pillsbury was professor of psychology at the University of Michigan from 1897 to 1942. His papers include family and professional correspondence, University of Michigan materials, writings, and photographs.

The Walter B. Pillsbury papers consisting of correspondence, course materials, writings, and photographs documents the career of one of the significant leaders in the early development of psychology as a discipline. The collection was received in three principal accessions from Pillsbury and members of his family. The series in the collection are Biographical/personal, Professional Files, Photographs, and Family Papers.

Professor of Geology at the University of Michigan, also chairman of the Ann Arbor Branch of the National Security League during World War I. His papers contain correspondence and other materials concerning his activities with the National Security League, a dispute over the political views of Charles Lindbergh, polar expeditions, and his work in the fields of geology, seismology, and meteorology. The collection also includes manuscripts of published and unpublished books and articles, biographical material, scrapbooks and notebooks detailing the University of Michigan expeditions to the Pacific and Greenland, and travel notes of trips to the Near East, Spain, the West Indies, Switzerland, and Russia.

The William Herbert Hobbs papers, 1880-1955, is comprised of correspondence, scrapbooks, manuscripts, printed material, and photographs documenting Hobbs' professional, political, and personal activities. Correspondence and other materials concern his activities with the National Security League, a dispute over the political views of Charles Lindbergh, opinions and reviews of his writings and those of other scientists, communications with newspapers and colleagues regarding various expeditions, and his work in the fields of geology, polar exploration, seismology, and meteorology. The collection also includes manuscripts of published and unpublished books and articles, biographical material, scrapbooks and notebooks detailing the University of Michigan expeditions to the Pacific and Greenland, and travel notes of trips to the Near East, Spain, the West Indies, Switzerland, and Russia.