Jean Alexander Heinrich Clapier de Colongue

Jean Alexander Heinrich Clapier en Colongue, Russian, Ivan Petrovich (de) Kolong (Russian: Иван Петрович Колонг, scientific transliteration, Ivan Petrovich Kolong; * 22 Februarjul / 6 March 1839greg in Dvinsk, .. † Maijul 13 / 26 May. 1901greg. St. Petersburg ) was a Russian scholar of Navigation and major General of the Russian army.

Life

He came from a noble family of Baltic Clapier de Colongue.

He is one of the founders of the theory of the deviation of the magnetic compass. Clapier de Colongue invented in 1875 named after him deflector. He also drew up guidelines for compensation of marine compasses, who found international recognition. Clapier de Colongue was a member of the Russian Academy of Sciences.