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/ 27
Abbe-type microscope camera lucida

Abbe-type microscope camera lucida

Bausch & Lomb Optical Company
circa 1929
bottle of ammoniac-nickelous sulfate

bottle of ammoniac-nickelous sulfate

Chemistry Laboratory, Harvard College
late 19th-early 20th Century
bottle of broken limestone

bottle of broken limestone

Chemistry Laboratory, Harvard College
circa 1900
box of galvanometer parts, including mirrors, wire, and terminal block

box of galvanometer parts, including mirrors, wire, and terminal block

Leeds & Northrup Company
1930-1950
bracket and screws

bracket and screws

French
1875-1900
bracket to hold reflecting galvanometer scale and telescope

bracket to hold reflecting galvanometer scale and telescope

Leeds & Northrup Company
early 20th Century
bridge testing switch

bridge testing switch

Leeds & Northrup Company
late 19th-early 20th Century
cathetometer rule

cathetometer rule

S.I.P Geneve
1880
Chinese raw silk dyed with aniline red

Chinese raw silk dyed with aniline red

Chemistry Laboratory, Harvard College
dated 1891
current transformer

current transformer

Leeds & Northrup Company
circa 1910
cylindrical bottle filled with iron brads

cylindrical bottle filled with iron brads

Chemistry Laboratory, Harvard College
circa 1900
D'Arsonval wall galvanometer on stand with moving coil

D'Arsonval wall galvanometer on stand with moving coil

Leeds & Northrup Company
circa 1910
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The Collection of Historical Scientific Instruments
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p. 617-495-2779 • f. 617-496-5794
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