This prism spectrometer was made by Franz Schmidt & Haensch, of Berlin, and purchased from Alfred Hirschmann, for the Ryerson Laboratory at the University of Chicago, on Jan. 1, 1894. The cost was $112.50. The inked “R.L. 194” inscription refers to the Ryerson Laboratory.
Alfred Hirschmann was at the Columbian Exposition, in Chicago in 1893, representing Franz Schmidt & Haensch, and the Physikalish Technische Reichsanstalt in Berlin. He was in charge of the German instrument exhibit.
Ref: The World’s Columbian Exposition, Chicago, 1893. Special Catalogue of the Collective Exhibition of Scientific Instruments and Appliances exhibited by the Deutsche Gesellschaft fur Mechanik und Optik (Berlin, 1893), pp. 19-22.
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