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Physics
Electricity. Magnetism. Electromagnetism Notes: This is an OCR reprint. There may be numerous typos or missing text. There are no illustrations or indexes.
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108 pages, Paperback
First published January 1, 1690
But sound, as I have said above, only travels 180 toises in the same time of one second: hence the velocity of light is more than six hundred thousand times greater than that of sound.