<span>Catalogs and price lists for 10 companies selling electrical, measurement, and other scientific equipment collected by Harry Eisenman during research for his dissertation. Companies include Ross and Co. in 1883; J.E. Surman and Co.; Jewell Pure Water Co. in 1888; Wm. Gaertner and Co.; L. Casella, Scientific Instrument Maker; The Pulsometer Engineering Co., Ltd.; </span><span>The Scientific Shop in 1908; Mechanical Arithmetic; Sprague Electric Co.; and The Baker and Adamson Chemical Co. in 1902. One brochure from Wm. Gaertner and Co. includes photographs of certain apparatus. Includes length of wire from The W. Bingham Co.Charles F. Brush, Sr., PapersSeries 12: Harry Eisenman's Dissertation on Charles F. Brush (1963-1967)Box 37Folder 11</span>

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