N/A. English: Cover page of the English translation of 'Untersuchungen über die ausbreitung der elektrischen kraft'. Dirt and library stamp removed with GIMP clone tool, sharpened also. 1893. Author: Heinrich Hertz , Heinrich Rudolph Hertz, Daniel Evan Jones 503 Electric Waves being Research on the Propagation of Electric Action with Finite Velcity Through Space

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Keywords: ., /., 1893., author, da, heinrich, hertz, rudolph