Tolmachev, Inokkentiy Pavlovich (1872–1950)
Tolmachev, Inokkentiy Pavlovich (1872–1950) – was a geologist and geographer and an explorer of Altai, the north of East Siberia, and the Far East. In 1896 T. graduated from the physico-mathematical faculty of the Siberian University. T. worked in Leipzig and in Munich, as an assistant in the University of Tartu. In 1898 T. was invited by St. Petersburg Academy of Science as a curator of its geological museum. In 1898–1899 and 1902 T. worked in Altai and Kuznetsk Alatau. In 1905 T. was commissioned by the Russian Geographical Society to head the Khatanga expedition, in which topographer M. Kozhevnikov took part. T. surveyed the Verkhniy Kotuy Basin, while Kozhevnikov explored Lake Yessey. After that they followed all along the course of the Moyero, the main tributary of the Kotuy River (825 km). Then they rafted along the Kotuy and reached the Khatanga, discovering the Anabar Plateau. They went down the Khatanga, reached its mouth, and traveled along the eastern coast of Khatanga Bay (the Laptev Sea) on reindeers. Kozhevnikov was the first to map it correctly. Due to the reindeer food shortage, they returned to the Anabar River mouth, going up the river ice to reach its origin, following the course of the river (939 km). During this voyage they finished discovering a plateau named Anabar by T. After that they parted again; T. headed south, reached Olekminsk on the Lena and returned to St. Petersburg. Kozhevnikov went northwest, arrived in Dudinka on the Yenisei, and finished mapping of over 6,000 km. The expedition collected data for mapping of the territory of over 1 mln km2. In 1909 T. was appointed head of the North-East Expedition and invited Kozhevnikov to take part in it. Together they mapped the coastline from the Kolyma to Dezhnev Cape (over 2,500 km long), described the topography of the foreland, and collected valuable geological, botanical, and zoological collections. In 1911 T. published the book Along the Chukotka Coast of the Arctic Ocean. In the mid-1920s T. emigrated to the United States.