Signedon the right prism housing, cast in a square: BAUSCH / & LOMB / OPT. CO. / ROCHESTER, / N.Y., USA
on the left prism housing: B&L [in the prism trademark]
Inscribedon the right prism housing, stamped: ED 3650
Historical AttributesThis instrument was owned by Dr. Eathan Allen Brown (d. 1979), a Boston allergist. Dr. Brown also owned microscope nos. 1324 and 1357.
Primary SourcesBausch & Lomb Optical Co., Bausch & Lomb Scientific Instruments, collection of catalogues (Rochester, circa 1951), which includes the Bausch & Lomb catalogue D-15 (1948) describing this instrument and its variations.
ProvenanceDr. Eathan Allen Brown, Boston, MA; Countway Library of Medicine; transfer to CHSI, 1983.