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resistance standard

resistance standard

Queen & Company
1893-1910
resistance standard

resistance standard

Queen & Company
1893-1910
resistance standard

resistance standard

Queen & Company
1893-1910
resistance standard

resistance standard

Queen & Company
1893-1910
resistance standard (0.1 Ohm)

resistance standard (0.1 Ohm)

Otto Wolff
circa 1900
resistance standard (0.1 Ohm)

resistance standard (0.1 Ohm)

Leeds & Northrup Company
1903-c1930
resistance standard (0.01 Ohm)

resistance standard (0.01 Ohm)

Otto Wolff
circa 1903
resistance standard (0.001 Ohm)

resistance standard (0.001 Ohm)

Otto Wolff
1880-1910
resistance standard (1 Ohm)

resistance standard (1 Ohm)

Otto Wolff
1900
resistance standard (2 Ohms)

resistance standard (2 Ohms)

Otto Wolff
circa 1903
resistance standard (4 Ohms)

resistance standard (4 Ohms)

Otto Wolff
circa 1903
resistance standard (10 Ohms)

resistance standard (10 Ohms)

Otto Wolff
circa 1900
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The Collection of Historical Scientific Instruments
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