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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
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
100 amp shunt

100 amp shunt

Weston Electrical Instrument Corporation
circa 1912
100g of yttrium dust in sealed glass tube

100g of yttrium dust in sealed glass tube

Percy Williams Bridgman
circa 1925
1000 amp shunt

1000 amp shunt

Weston Electrical Instrument Corporation
circa 1912
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1900
AC ammeter

AC ammeter

Weston Electrical Instrument Corporation
circa 1930
Acme mounted rectifier, oscillator, and vacuum tube for teaching

Acme mounted rectifier, oscillator, and vacuum tube for teaching

ACME Apparatus Company
circa 1920
AC mil-ammeter

AC mil-ammeter

Weston Electrical Instrument Corporation
circa 1900
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