Humboldt State University ® Department of Chemistry

Robert A. Paselk Scientific Instrument Museum

The essay below is taken from: Arthur H. Thomas Co. Laboratory Apparatus and Reagents. Philadelphia (1921). It preceeds the catalog descriptions of refractometers in the catalog.

catalog scan of Thomas catalog refractometer essay

Refractometer Exhibit Catalog

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HSTC (1921-34)
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HSC (1935-1953)
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HSC (1954-1973)

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Last modified 21 August 2010