Ivan de Collong
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| Ivan de Collong | |
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 Ivan de Collong
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| Born | February 22, 1839 O.S. (March 2, 1839 N.S.) Dinaburg, Kurland Gubernia, Russia |
| Died | May 13, 1901 O.S. (May 26, 1901 N.S.) Saint Petersburg, Russia |
Ivan Petrovich de Collong (Russian: Иван Петрович де-Колонг) (March 2, 1839 N.S. - May 26, 1901 N.S.) was a Russian Naval engineer, a founder of a theory of Deviation of magnetic compasses.
Ivan Petrovich de Collong was born on February 22 O.S., 1839 in Dinaburg in a family of Kurland nobels. He studied in Naval Academy (Saint Petersburg) and then 1870 worked there as a lecture. Since 1878 was a chief of a navy compass administrative department. In 1875 he had constructed a compass baffle and then had improved it.
Ivan Petrovich de Collong was a Corresponding Member of the Russian Academy of Sciences (since 1896) and Major-General of Russian Namvy. He was aworderd Lomonosov prize of Russian Academy of Sciences.
