Science and Technology 12.docx - Tools Denis Papin starts a series of experiments with double-acting air pumps during the three years that he is

Science and Technology 12.docx - Tools Denis Papin starts a...

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Tools Denis Papin starts a series of experiments with double-acting air pumps during the three years that he is employed by Robert Boyle. See also 1716 tool. Robert Hooke, in a list of inventions that he intends to publish, includes the anagram “ceiiinosssttuu,”which he reveals in 1679 to mean ut tensio, sic vis (“of the extension, so the force”). In other words, Hooke’s law –– strain is proportional to stress in an elastic material. See also 1658 tool; 1679 tool. Hooke invents a form of universal joint. See also 1664 tool. 1677 _ Astronomy On November 7, Edmond Halley makes the first complete observation of a transit
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Unformatted text preview: of Mercury. See also 1676 ast. B Biology In November Anton van Leeuwenhoek confirms the discovery of sperm by Louis Dominicus Hamm. Unlike Hamm, who thinks sperm are evidence of disease, Leeuwenhoek concludes that sperm are the sources of reproduction, the larvae of humans (since Leeuwenhoek did not know of the mammalian egg, he did not propose fertilization). See also 1673 tool; 1680 bio. _ Chemistry Johann Kunckel [b.Hutten (Germany), 1630, d. Dreissighufen (Germany),March 1703] describes an aqueous solution of ammonia. See also 1695 chem....
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