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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
60° fused quartz prism

60° fused quartz prism

Theodore Lyman IV
circa 1920
100 amp shunt

100 amp shunt

Weston Electrical Instrument Corporation
circa 1912
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 Reflex Acmefone radio receiver

ACME Reflex Acmefone radio receiver

ACME Apparatus Company
1923
Acme type Y-1 vacuum tube radio detector

Acme type Y-1 vacuum tube radio detector

ACME Apparatus Company
1920
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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