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1-1-10 ampere shunt

1-1-10 ampere shunt

Weston Electrical Instrument Corporation
late 19th-early 20th Century
1amp shunt

1amp shunt

Weston Electrical Instrument Corporation
circa 1912
5 amp shunt

5 amp shunt

Weston Electrical Instrument Corporation
circa 1912
10 amp shunt

10 amp shunt

Weston Electrical Instrument Corporation
circa 1912
100 amp shunt

100 amp shunt

Weston Electrical Instrument Corporation
circa 1912
1000 amp shunt

1000 amp shunt

Weston Electrical Instrument Corporation
circa 1912
Abbe-type microscope camera lucida

Abbe-type microscope camera lucida

Ernst Leitz (company)
circa 1930
Abbe-type microscope camera lucida

Abbe-type microscope camera lucida

Bausch & Lomb Optical Company
circa 1929
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1900
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1930
achromatic doublet lens

achromatic doublet lens

Edmund Salvage Company
1942-1950
AC mil-ammeter

AC mil-ammeter

Weston Electrical Instrument Corporation
circa 1900
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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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