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Electrical transformer used to produce high-voltage pulses from a low-voltage direct current, patented in 1851 by Heinrich Ruhmkorff. Engraving from L'Electricite' by J. Baille, Paris-Hachette 1868.

Stock Photo:
Image ID: 100792786
Release Information: N/A
Copyright: Luisa Fumi
Small
500x351 6.9"x4.9" (72dpi) 71 KB
Med
1000x701 3.3"x2.3" (300dpi) 278 KB
Large
3207x2249 10.7"x7.5" (300dpi) 1.9 MB
Super
6414x4498 21.4"x15.0" (300dpi) approx.8.3 MB
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