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27.5 MB (9.1 MB compressed)
3484 x 2756 pixels
29.5 x 23.4 cm ⏐ 11.6 x 9.2 in (300dpi)
COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY
Gramme dynamo. Illustration of the dynamo design and produced by Belgian engineer Zenobe Gramme (1826-1901). Dynamos are devices used to convert rotary motion into electrical power. This is achieved by rotating magnets around wires, and generates direct electrical currents. Artwork part of the 'Les merveilles de la science' series from 1878 by Louis Figuier.
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