This is a large binocular dissecting instrument with triple nosepiece. The stage is marked “SPENCER / BUFFALO / U.S.A.” and the arm is marked “242043.” This serial number indicates a date of 1945. This was used by Min-Chuan Chang (1908-1991), a biologist who was born in China and educated in Britain, and who arrived in the United States in 1945. Working with Gregory Pincus at the Worcester Foundation for Experimental Biology, Chang pioneered the field of in vitro fertilization, co-discovered the birth control pill, and made other contributions to the field of reproductive biology.
Currently not on view
Object Name
date made
Spencer Lens Co.
Physical Description
metal (overall material)
overall: 31.1 cm x 13.3 cm x 20.3 cm; 12 1/4 in x 5 1/4 in x 8 in
place made
United States: New York, Buffalo
ID Number
catalog number
accession number
Science & Scientific Instruments
See more items in
Medicine and Science: Biological Sciences
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Worcester Foundation for Experimental Biology, Inc.

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