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1 gallon glass bottle "BENZENE" empty

1 gallon glass bottle "BENZENE" empty

Central Scientific Company
early 20th Century
2 bakelite pulleys fork-mounted on rods

2 bakelite pulleys fork-mounted on rods

Central Scientific Company
circa 1929
2 laboratory end supports for holding a single horizontal rod

2 laboratory end supports for holding a single horizontal rod

Central Scientific Company
1900-1925
2 printed centimeter scales

2 printed centimeter scales

Central Scientific Company
early 20th Century
3 diffraction color photographs, slit, color photograph on lantern slides

3 diffraction color photographs, slit, color photograph on lantern slides

American
circa 1906
3 laboratory end supports for holding a single horizontal rod

3 laboratory end supports for holding a single horizontal rod

Central Scientific Company
1900-1925
Abbe refractometer, Zeiss Model I

Abbe refractometer, Zeiss Model I

Carl Zeiss Jena
circa 1915
Alluard dew point gauge

Alluard dew point gauge

Central Scientific Company
1900-1930
alternating current motor demonstration (?)

alternating current motor demonstration (?)

Central Scientific Company
ca. 1910-1940
aluminum tuning fork, 100 VPS

aluminum tuning fork, 100 VPS

Central Scientific Company
circa 1950
aluminum tuning fork, C

aluminum tuning fork, C

Central Scientific Company
circa 1950
AMRAD type 2611 variometer

AMRAD type 2611 variometer

American Radio and Research Corporation
circa 1921
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The Collection of Historical Scientific Instruments
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