Spencer no. 44 laboratory compound microscope
Date: 1930
Inventory Number: 1360
Classification: Microscope
Subject:
Maker: Spencer Lens Company (1895 - 1945)
Inventor: Ernst Abbe (1840 - 1905)
Owner: Elso S. Barghoorn (1915 - 1984)
User: Gray Herbarium (founded 1842)
Cultural Region:
Place of Origin:
Dimensions:
32 x 17 x 11 cm (12 5/8 x 6 11/16 x 4 5/16 in.)
Accessories: ocular: compensating 12x; Spencer objectives on triple nosepiece (3): 16, 4, 1.8 mm; Abbe condenser
Bibliography:
Spencer Microscopes, Microtomes, Delineascopes, and Optical Measuring Instruments
Description:
This is a Spencer no. 44 laboratory compound microscope. It has a blackened horseshoe-shaped base of cast iron, a curved arm, and a monocular body. The body is equipped with a draw tube in a cloth-lined sleeve and a three-objective revolving nosepiece. The coarse focus is by rack and pinion and the fine focus is by a side screw. The focus knobs are chrome-plated.
There is a rectangular Bakelite stage (stage clips missing). A fork mounted condenser with an iris diaphragm and a slot for filters are located beneath the stage. The substage mount is adjustable by means of rack and pinion and has a slot for a plug-in mirror (missing). The condenser is the "new divisible type," comprising a combined condenser and a darkfield illuminator,
There is a rectangular Bakelite stage (stage clips missing). A fork mounted condenser with an iris diaphragm and a slot for filters are located beneath the stage. The substage mount is adjustable by means of rack and pinion and has a slot for a plug-in mirror (missing). The condenser is the "new divisible type," comprising a combined condenser and a darkfield illuminator,
Signedon body: SPENCER / BUFFALO / U.S.A [in trademark]
Inscribedon arm: 125973
on heel of foot: 325
on heel of foot: 325
Historical AttributesThis instrument was used in Professor Barghoorn's laboratory in the Gray Herbarium, Harvard University.
Primary SourcesSpencer Lens Company, Spencer Microscopes, Microtomes, Delineascopes, and Optical Measuring Instruments (Buffalo, NY: Spencer Lens Company, [1930?]), 17.
ProvenanceFrom Professor Elso Barghoorn's laboratory, Gray Herbarium, Harvard University, 1986