Signedon plate on table clamp: SPENCER LENS CO. / BUFFALO N.Y. U.S.A.
on specimen holder: American Optical Co. / Buffalo N.Y. / Made in the U.S.A.
Inscribedon plate on table clamp: NO. 2992
Historical AttributesThis instrument was used in the Biological Laboratories, Harvard University, Cambridge, MA.
Primary SourcesSpencer Lens Company, Catalog of Spencer Products (Buffalo, NY: Spencer Lens Company, 1924), 78.
ProvenanceBiological Laboratories, Harvard University; transfer to CHSI, 1981