Signedon plaque in rear: BAUSCH & LOMB OPTICAL CO. / ROCHESTER, N.Y., U.S.A.
on housing in front and on plaque in rear: B & L [in a triangular trademark]
Inscribedon rear plaque: TYPE 31- 33 - 27
Historical AttributesThis instrument was used by Professor Peter Stevens in the Gray Herbarium.
ProvenanceProfessor Peter Stevens, Gray Herbarium, Cambridge, MA; transfer to CHSI, 1987.