Måling af elektriske strømme: regel af Andre Marie Ampere (1775-1836). Nordpolen er til venstre for observatøren. Anonym illustration fra 1925. Privat samling.(Measurement of electrical currents: rule by Andre Marie Ampere (1775-1836). The north pole is to the left of the observer. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
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Udateret · Engraving
· Billed-ID: 1047987
Private Collection / Bridgeman Images |
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