31.8 MB (2.1 MB compressed)
3139 x 3543 pixels
26.7 x 30.0 cm ⏐ 10.5 x 11.8 in (300dpi)
LIBRARY OF CONGRESS / SCIENCE PHOTO LIBRARY LIBRARY OF CONGRESS / SCIENCE PHOTO LIBRARY
Editorial use only.
19th Century electrostatic generator. Historical image of a man seated next to a Holtz electrostatic influence machine. This device was an electrostatic induction generator that converted mechanical work into electrostatic energy, and only needed an initial charge to begin operation. It was invented by Wilhelm Holtz in 1865, and was the first really powerful influence machine to be developed. Photographed in 1876.
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