AO model 370 adjustable laboratory and microscope lamp
Date: circa 1955
Inventory Number: 2004-1-0337
Classification: Microscope Light Source
Subject:
Maker: American Optical Company (1833-present)
Supplier: Jarrell-Ash Company (1933 - 1968)
User: Mineralogical Museum, Harvard University (founded circa 1775)
Cultural Region:
Place of Origin:
Dimensions:
without cord: 23 × 16.5 × 19.5 cm (9 1/16 × 6 1/2 × 7 11/16 in.)
Description:
This is an adjustable microscope and laboratory illuminator. The lamp housing is finished in crinkled black enamel. It is attached to a chromium-plated metal rod, which sits on a heavy, circular cast-iron base. It is adjustable in height and locked with a thumb screw.
The multi-filament bulb is 100 watt, 120 volt "Sunray.". A silvered glass reflector is behind the bulb. The electrical cord comes out of its socket at the bottom of the lamp housing. The metal housing has a chimney.
The condensing lenses, diaphragm, filters, and the front structure to hold these are missing.
The multi-filament bulb is 100 watt, 120 volt "Sunray.". A silvered glass reflector is behind the bulb. The electrical cord comes out of its socket at the bottom of the lamp housing. The metal housing has a chimney.
The condensing lenses, diaphragm, filters, and the front structure to hold these are missing.
Signedon plaque on ring base: American Optical Company / Scientific Instrument Division / Buffalo 15, New York
on plaque on ring base: MADE IN U.S.A.
on plaque on ring base: AO [in shield]
on plaque on ring base: JARRELL-ASH COMPANY / SCIENTIFIC INSTRUMENTS / BOSTON 16, MASS.
on plaque on ring base: MADE IN U.S.A.
on plaque on ring base: AO [in shield]
on plaque on ring base: JARRELL-ASH COMPANY / SCIENTIFIC INSTRUMENTS / BOSTON 16, MASS.
Historical AttributesUsed in the Mineralogical Museum at Harvard University.
ProvenanceMineralogical Museum, Harvard University; transfer to CHSI, 2004.