Elektriske fænomener: vekselstrømme. Man kan få et billede af disse strømme ved at løfte og sænke en tragt forbundet til et vandkar. Anonym illustration fra 1925. Privat samling.(Electrical phenomena: alternating currents. One can get an image of these currents by lifting and lowering a funnel connected to a water vessel. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
€ 122.69
Enthält 25% MwSt.
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Udateret · Engraving
· Billed-ID: 918286
Private Collection / Bridgeman Images |
0 Anmeldelser |