Féry Refractometer

The French physicist, Charles Féry, described this type of instrument in 1891. The Parisian instrument maker, Ph. Pellin, promoted it for industrial purposes. This example is marked “ADAM HILGER LTD. LONDON ENGLAND.” Hilger trade literature describes it as “A direct reading refractometer for taking the refractive index for sodium light of oils; solutions of acids; mixtures of glycerine, alcohols, etc., with water; sugar solutions; and other liquids of interest to the industrial chemist.”
Hilger trade literature indicates that the firm offered the Féry refractometer in 1913-1914, but dropped it in favor of other forms in the 1920s.
Ref: Adam Hilger, Ltd., General Catalogue (London, 1913), p. M5.
Currently not on view
Object Name
Adam Hilger, Ltd.
place made
United Kingdom: England, London
ID Number
catalog number
accession number
Science & Mathematics
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Columbia University

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