Production year
1939
© Fonds historique / CNRS Images
Reference
19000001_0179
Susceptibilities measuring device (electromagnet) photographed on May 26th, 1939
Susceptibilities measuring device (electromagnet) photographed on May 26th, 1939. Office national des recherches scientifiques et industrielles et des inventions. Extract from the book Inventions 1915-1939 by Luce Lebart.
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