Wheel and pinion ammeter with setting up springs for sensitiveness over restricted region

Made:
1882
Wheel and pinion ammeter with setting up springs for

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Wheel and pinion ammeter with setting up springs for
Science Museum Group
© The Board of Trustees of the Science Museum

Wheel and pinion ammeter with setting up springs for sensitiveness over restricted region, 1882

Details

Category:
Electricity Supply
Object Number:
1909-17
type:
pinion
credit:
Ayrton, H.