Louis de l'Isle de la Croyère

Louis de l'Isle de la Croyere
Portrait of Louis de l'Isle
Died	October 21, 1741(1741-10-21) (aged 55–56) Avacha Bay
Academic work
Discipline	Astronomy

Louis de l'Isle de la Croyère (1685, Paris – 10 October 1741, Petropavlovsk, Kamtchatka), was a French astronomer who served the Russian Empire and became an academician of the Russian Academy of Sciences in Saint-Petersburg.

Biography

Louis de l'Isle was the son of historian and geographer Claude Delisle (1644–1720) and half brother of cartographer Guillaume Delisle (1675–1726). He was invited to Russia in February 1726 by his brother Nicolas (1688–1768) who had arrived the previous year as the director of the cartography department at the Imperial Saint Petersburg Academy of Sciences. Louis de l'Isle was made professor of astronomy and academician in January 1727.

He was named as the head of the first astronomical and geological expedition in Russia's European north. He reported observations on the region of Arkhangelsk and on the Kola Peninsula (1727–1729). His journals were the first to report the geographical locations of many shores along the White Sea.

References

• Klein, Olivier. Un voyage scientifique au XVIIIème siècle: le voyage de Delisle de la Croyère dans le nord de la Russie, Mémoire d'Histoire, Université Paris VII, 2002.