Watt meter on principle of Siemen's dynamometer

Made:
1881
SMG00224310

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SMG00224310
Science Museum Group
© The Board of Trustees of the Science Museum

Watt meter on principle of Siemen's dynamometer, first in England, 1881

Details

Category:
Electricity Supply
Object Number:
1909-25
type:
meter
credit:
Ayrton, H.