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Gallery-Electricity VII

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Big influence machine(1915)
Induction coil (1892)
Big induction coil (ca 1890)

Small inductor (1896)
Power supply type Rfz9
Siemens & Halske (ca 1928)
D366 Philips (ca. 1930)

Normal resistances, 1887-1891
Rheostat, ca 1900
Rheostat, 1892

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