AO model 350 AC transformer for microscope illumination
Date: 1950-1955
Inventory Number: 2009-1-0073
Classification: Transformer
Subject:
Maker: American Optical Company (1833-present)
User: William Alexander Jackson (1905 - 1964)
User: William H. Bond (1915 - 2005)
User: Houghton Library, Harvard University (founded 1942)
Cultural Region:
Place of Origin:
Dimensions:
without cord: 8.2 × 10.7 × 11.8 cm (3 1/4 × 4 3/16 × 4 5/8 in.)
Description:
Small transformer for microscope lamp. The voltage selector dial runs from 2.5 to 7.5. There is a toggle switch and light. The socket for the lamp plug is in the front. Below and to the left of this socket is the cord and plug for AC power. The housing is black and silver plastic.
Signedon the top by the dial: American Optical
stamped on underside of base: American Optical Company / INSTRUMENT DIVISION / BUFFALO 15 N. Y. MADE IN U.S.A.
stamped on underside of base: American Optical Company / INSTRUMENT DIVISION / BUFFALO 15 N. Y. MADE IN U.S.A.
Inscribedon underside of base: MOD. 350
on plastic socket for plug from lamp: GROUND AERIAL
on plastic socket for plug from lamp: GROUND AERIAL
Historical AttributesUsed by William A. Jackson, first librarian of Houghton Library, and William H. Bond, another Houghton librarian.
When Houghton Library opened in 1942, Jackson invested in a lot of state-of-the-art equipment for examining books and investigating them. The apparatus included microscopes, black lights, and special lamps. This was one of them.
When Houghton Library opened in 1942, Jackson invested in a lot of state-of-the-art equipment for examining books and investigating them. The apparatus included microscopes, black lights, and special lamps. This was one of them.
ProvenanceWilliam A. Jackson, Librarian, Houghton Library, Harvard University, c. 1942 ; transfer to CHSI courtesy of Dennis Marnon, 2009.