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4.5-inch telescope objective

4.5-inch telescope objective

Bausch & Lomb Optical Company
circa 1900
4 equilateral prisms

4 equilateral prisms

John A. Brashear
circa 1890
4 horseshoe magnets with horseshoe-shaped keeper

4 horseshoe magnets with horseshoe-shaped keeper

American
1875-1925
5 amp shunt

5 amp shunt

Weston Electrical Instrument Corporation
circa 1912
5 double convex lenses

5 double convex lenses

American
mid 20th Century
5 pierced rectangular magnets

5 pierced rectangular magnets

American
1940-1960
7 spherical cylindrical plano-convex lenses

7 spherical cylindrical plano-convex lenses

American
mid 20th Century
9 lantern slides of diffraction patterns, atomic structure, spectra.

9 lantern slides of diffraction patterns, atomic structure, spectra.

Jefferson Physical Laboratory, Harvard University
1925-1940
10 amp shunt

10 amp shunt

Weston Electrical Instrument Corporation
circa 1912
Image Not Available

19 assorted positive lenses

American
mid 20th Century
60° quartz prism

60° quartz prism

German
1912
100 amp shunt

100 amp shunt

Weston Electrical Instrument Corporation
circa 1912
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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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