photometer
Date1970-1980
Inventory Number2006-1-0053
ClassificationPhotometer
Subject
Maker
American
User
Oak Ridge Station
1931 - 2005
User
George R. Agassiz Station, Harvard
1951 - 1982
User
Harvard College Observatory
founded 1839
Dimensions29 × 26 × 18.8 cm (11 7/16 × 10 1/4 × 7 3/8 in.)
Material
DescriptionFoam-insulated photometer with a red vinyl covering secured by a draw-string. The photometer is made of grey metal and glass. The opening for the light source is a shutter operated by a plunger. There are two large openings at the top, possibly for cooling the instrument.
Signedunsigned
Curatorial RemarksRobert Stefanik of the CfA thinks that it might have been cooled with ice via the two tubes at the top.
ProvenanceHarvard College Observatory, Agassiz Station; transfer to CHSI in 2005.
Historical AttributesUsed by Harvard College Observatory at the George R. Agassiz Station in Harvard, Mass.
Adam Hilger Ltd.
Date: circa 1920
Accessories: case, adaptive collars, aperture stops (2): 1/4, 1/6
Object number: 1997-1-1835
Kollmorgen Corporation
Date: circa 1980
Accessories: Two instructions manuals: SPECTRA PRITCHARD PHOTOMETER, MODEL 1980A, CONDENSED OPERATING INSTRUCTIONS; INSTRUCTION AND MAINTENANCE MANUAL FOR SPECTRA PRITCHARD PHOTOMETER, Model 1980A. Both in gray archival box, C2-H1
Object number: 2004-1-0214a
