This collection includes letters from prominent sociologists and economists such as Richard T. Ely, Henry C. Adams, Simon N. Patten, Frank W. Taussig, Francis A. Walker, and others, which deal with academic activities in the field of sociology and with Giddings' book, THE PRINCIPLES OF SOCIOLOGY (New York, 1896). In addition, there are letters and manuscripts dealing with the League of Peace, forerunner of the League of Nations; typescripts of his speeches on various subjects; miscellaneous notes; one box of students' term papers and theses dealing with sociological topics; and related printed materials. There are also questionnaires and letters pertaining to a study made in 1911-1912 by George Esdras Bevans on THE DISTRIBUTION OF WORKINGMEN'S TIME. The correspondents include: Jane Addams, William Jennings Bryan, Charles Beard, and Jacob Riis. There is also a bibliography of publications by Giddings and of works relating to his field; and genealogical notes of the Miller/Millard family of New England.

Correspondence relating to Erskine's various educational, musical and literary interests; manuscripts of his writings; lecture notes for college courses; souvenirs of his army service in World War I and his Columbia University professorship, and student papers from his own school and college days. Also, biographical file, scrapbooks, and articles.

Correspondence, manuscripts, notes, documents, book typescripts, photographs, and printed materials covering the time from Dorfman's early interest, as a graduate student, in the economic thought of Thorstein Veblen until his retirement. There is correspondence with his academic colleagues, students, publishers, and the family and students of Thorstein Veblen, as well as manuscripts, typescripts, drafts, revisions, notes, photographs, pamphlets, and related materials for his articles and books which include: THORSTEIN VEBLEN AND HIS AMERICA, 1934; THE ECONOMIC MIND IN AMERICAN CIVILIZATION, 1946-1959; EARLY AMERICAN POLICY, 1960; INSTITUTIONAL ECONOMICS, 1963; TYPES OF ECONOMIC THEORY, 1967; and NEW LIGHT ON VEBLEN, 1973