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Alexandre Chessin was born in St. Petersburg in the Russian empire in 1866 and was a professor of Pure and Applied Mathematics at Johns Hopkins University from 1895 to 1899. This collection contains photocopies of handwritten lectures given by Chessin from the 1895 to 1896 academic year, collectively titled: "Introduction into the Study of the Theory of Functions--Lectures Delivered at J.H.U. in 1895-96 by Alexandre S. Chessin--Part I. Functions of Real Variables"
Dr. Warren S. Torgerson was internationally known for his work in psychological measurement at Johns Hopkins University. The files include primarily experiment notes and data sets, some lecture notes, and some correspondence, dating from 1962 through 1983.