Crouch binocular compound microscope
Date: circa 1893
Inventory Number: 1148
Classification: Microscope
Subject:
Maker: Henry Crouch (late 1800s)
Maker: Robert B. Tolles (1823 - 1883)
Supplier: James W. Queen & Company (1853 - 1893)
Owner: Alexander Agassiz (1835 - 1910)
Owner: Museum of Comparative Zoology (founded 1859)
Collector: Ernst-Lewis Collection of Microscopes
Cultural Region:
Place of Origin:
Dimensions:
40 x 21 x 15 cm (15 3/4 x 8 1/4 x 5 7/8 in.)
Accessories: objective: Tolles 1/4 ", dated 3/30/1869; paired oculars 31mm diameter (2); circular stage; condensor with diaphragm wheel; flat concave substage mirror
Description:
This is a Crouch binocular compound microscope. It has a curved arm and a standing tripod base with a curved u-shaped back. The binocular body is comprised of two converging body tubes. The coarse adjustment is by rack and pinion. The fine adjustment is by a screw and lever located near the nosepiece.
The microscope has a circular, rotating stage with a knurled edge. The stage also has a glass surface and a hole in the center. Sub stage equipment includes a condenser, a rotating disc diaphragm, and a mirror on a swinging tube.
The instrument is constructed of brass. The arm and base are blackened.
The microscope has a circular, rotating stage with a knurled edge. The stage also has a glass surface and a hole in the center. Sub stage equipment includes a condenser, a rotating disc diaphragm, and a mirror on a swinging tube.
The instrument is constructed of brass. The arm and base are blackened.
In Collection(s)
Signedon base: Henry Crouch, London / Agents
on base: James W. Queen & Co. Philadelphia
on base: James W. Queen & Co. Philadelphia
Inscribedon base: 1601
Historical AttributesThe instrument was used in Alexander Agassiz's Newport Laboratory.
Curatorial RemarksThere is a note by Dr. Lewis about the maker, Henry Crouch, in the file.
ProvenanceAlexander Agassiz's Newport Laboratory; Harvard University Museum of Comparative Zoology; Ernst-Lewis Collection of Microscopes (inv. no. 148), Harvard Medical School.