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light viewer

light viewer

Edwin H. Land
circa 1959
fuschia filter gels (3)

fuschia filter gels (3)

American
1970-1985
leveling mount for surveying instrument

leveling mount for surveying instrument

American
circa 1910
illumination meter with quartz filter

illumination meter with quartz filter

Weston Electrical Instrument Corporation
1935-1945
analytical balance

analytical balance

Christian Becker
circa 1900
wind recording charts

wind recording charts

Julien P. Friez & Sons
1900-1929
tangent galvanometer

tangent galvanometer

Adolphe Gaiffe
circa 1870
balance weights

balance weights

William Ainsworth & Sons, Inc.
circa 1920
Lomara pocket compound microscope

Lomara pocket compound microscope

C. P. Goerz American Optical Company
1930-1939
wedge window

wedge window

Edmund Salvage Company
1942-1950
rheostat

rheostat

Central Scientific Company
circa 1920
phonograph speed indicator (two)

phonograph speed indicator (two)

American
1900-1960
/ 1044

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The Collection of Historical Scientific Instruments
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