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Professor of economics at University of Michigan, 1880-1921, statistician for the Interstate Commerce Commission, 1887-1911, developed standard accounting procedures for railroads. Papers include personal and professional correspondence, diaries, travel journals, drafts of books, letter books, reports and printed materials concerning his work with the Interstate Commerce Commission, his activities as an expert witness in railroad compensation and tax cases, and University of Michigan affairs.

The Henry Carter Adams papers consist of personal and professional correspondence, diaries, travel journals, drafts of books, letter books, reports and printed materials concerning his work with the Interstate Commerce Commission, his activities as an expert witness in railroad compensation and tax cases, and University of Michigan affairs.

Reports of comprehensive Michigan Railroad Appraisal, providing evaluations of every railroad in the state, directed by Mortimer E. Cooley at the request of Governor Hazen Pingree; also appraisals of plank roads and canals built in Michigan.

The record group consists of nine volumes of Michigan railroad appraisal reports. The appendix titled "List of Physical Items Inventoried" lists the types of property, machinery and equipment inventoried in the appraisals.