Spencer no. 57 junior stereoscopic dissecting compound microscope
Date: 1940-1945
Inventory Number: 2004-1-0335
Classification: Microscope
Subject:
Maker: Spencer Lens Company (1895 - 1945)
Maker: American Optical Company (1833-present)
Repaired by: Jarrell-Ash Company (1933 - 1968)
Cultural Region:
Place of Origin:
Dimensions:
30 x 12 x 18 cm (11 13/16 x 4 3/4 x 7 1/16 in.)
case: 50 x 19 x 29 cm (19 11/16 x 7 1/2 x 11 7/16 in.)
Accessories: oculars (1 pair): 10x; objectives (2 pairs): 1X and 2.3X ; case
Bibliography:
Spencer Low Power Binocular Microscopes
Description:
This is a Spencer no. 57 junior stereoscopic compound microscope.
The stand is cast iron and has a horseshoe-shaped base. The binocular body is of the Greenough-pattern with large prism housings. These are attached to a cone-shaped nosepiece that has two pairs of objectives permanently installed. Rack and pinion is provided for the coarse focus. The focus knob is chrome plated. The instrument has a black crackle finish.
The rectangular stage is missing a glass top and stage clips. The substage mirror is on a swinging arm.
The instrument is stored in a standing wooden case that is covered with a leather finish.
Two circular accessories--mostly parts of substage condensers from another instrument--are also in the box.
The stand is cast iron and has a horseshoe-shaped base. The binocular body is of the Greenough-pattern with large prism housings. These are attached to a cone-shaped nosepiece that has two pairs of objectives permanently installed. Rack and pinion is provided for the coarse focus. The focus knob is chrome plated. The instrument has a black crackle finish.
The rectangular stage is missing a glass top and stage clips. The substage mirror is on a swinging arm.
The instrument is stored in a standing wooden case that is covered with a leather finish.
Two circular accessories--mostly parts of substage condensers from another instrument--are also in the box.
Signedon right prism housing: AO [in shield] / SPENCER
on door of case: AO [in shield]
on plaque on foot: JARRELL-ASH COMPANY / SCIENTIFIC INSTRUMENTS / BOSTON, MASS.
on door of case: AO [in shield]
on plaque on foot: JARRELL-ASH COMPANY / SCIENTIFIC INSTRUMENTS / BOSTON, MASS.
Inscribedon left prism housing: 289172
Curatorial RemarksThis microscope is similar to the low power binocular microscopes illustrated in the 1935 Spencer catalogue [Lib. 1091].
Primary SourcesSpencer Lens Company, Spencer Low Power Binocular Microscopes (Buffalo, NY: Spencer Lens Company, 1935).
American Optical Company, Spencer Scientific Instruments (Buffalo: American Optical Company, 1947), 132.
American Optical Company, Spencer Scientific Instruments (Buffalo: American Optical Company, 1947), 132.