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Cross-listed in Inventors

Moritz von Jacobi

borndied
1801, Sep 211874, Mar 10
a German Jewish and Russian engineer and physicist born in Potsdam. Jacobi worked mainly in Russia. He furthered progress in galvanoplastics, electric motors, and wire telegraphy. While studying the transfer of power from a battery to an electric motor, he deduced the maximum power theorem. Jacobi tested motors output by determining the amount of zinc consum...
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Cross-listed in ClergyWritersInventors

Anyos Jedlik

aka: Ányos
bornactivedied
1800, Jan 111817-18731895, Dec 13
a Hungarian inventor, engineer, physicist, and Benedictine priest. He was also a member of the Hungarian Academy of Sciences, and author of several books. He is considered by Hungarians and Slovaks to be the unsung father of the dynamo and electric motor. Jedlik's best known invention is the principle of dynamo self-excitation. In 1827, Jedlik started experi...
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Cross-listed in Physicians

John Jeffries

bornactivedied
1745, Feb 51760s-18191819, Sep 16
a Boston physician, scientist, and a military surgeon with the British Army in Nova Scotia and New York during the American Revolution. Born in Boston, Jeffries graduated from Harvard College and obtained his medical degree at the University of Aberdeen. He is best known for accompanying Jean-Pierre Blanchard on his 1785 balloon flight across the English Cha...
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Cross-listed in Physicians

Edward Jenner

bornactivedied
1749, May 171770-18231823, Jan 26
an English physician and scientist who was the pioneer of smallpox vaccine, the world's first vaccine. The terms "vaccine" and "vaccination" are derived from Variolae vaccinae (smallpox of the cow), the term devised by Jenner to denote cowpox. He used it in 1798 in the long title of his Inquiry into the...Variolae vaccinae...known...[as]...the Cow Pox...
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Cross-listed in Inventors

Philipp von Jolly

borndied
18091884
a German physicist and mathematician. e studied science in Heidelberg, Vienna and Berlin. After his studies, he was appointed professor of mathematics in Heidelberg in 1839 and in physics in 1846. He moved to Munich in 1854 where he took the position once held by Georg Simon Ohm. In 1854 he was knighted (and henceforth referred to as von Jolly). Jolly was fi...
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