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/ 12
decade resistance box

decade resistance box

Leeds & Northrup Company
circa 1920
decade resistance box

decade resistance box

Leeds & Northrup Company
1910-1930
decade resistance box

decade resistance box

Leeds & Northrup Company
circa 1912
decade resistance box

decade resistance box

Leeds & Northrup Company
circa 1920
decade resistance box

decade resistance box

Leeds & Northrup Company
circa 1940
decade resistance box

decade resistance box

Leeds & Northrup Company
1910-1930
decade resistance box

decade resistance box

Leeds & Northrup Company
circa 1920
decade resistance box

decade resistance box

Leeds & Northrup Company
circa 1920
decade resistance box

decade resistance box

Leeds & Northrup Company
circa 1930
drum-type slide wire potentiometer

drum-type slide wire potentiometer

Leeds & Northrup Company
ca. 1920-1940
electromagnetic synchronizing fork, 60 Hz

electromagnetic synchronizing fork, 60 Hz

Leeds & Northrup Company
1907-1925
galvanometer

galvanometer

Leeds & Northrup Company
circa 1929
/ 12

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The Collection of Historical Scientific Instruments
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