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transit instrument

(Encyclopedia)transit instrument or transit, telescope devised to observe stars as they cross the meridian and used for determining time. Its viewing tube swings on a rigid horizontal axis restricting its movements...

Audubon Society, National

(Encyclopedia)Audubon Society, National, one of the oldest and best-known U.S. environmental organizations; founded 1886 by George Cird Grinnell and named for John James Audubon. The nonprofit organization, which h...

Gerlache, Adrien de

(Encyclopedia)Gerlache, Adrien de ädrē-ăN də gĕrläshˈ [key], 1866–1934, Belgian naval officer and explorer. Sailing with Norwegian explorer Roald Amundsen who would later be the first to reach the South Po...

Fort Chipewyan

(Encyclopedia)Fort Chipewyan chĭpəwīˈən [key], trading post, NE Alta., Canada, at the west end of Lake Athabasca. The old Fort Chipewyan, on the south shore, was built for the North West Company at the urging ...

Siberian Platform

(Encyclopedia)Siberian Platform or Angara Shield, large, geologically stable area of Precambrian rocks, N Asia, comprising much of Siberia, Russia. It is bounded, in general, on the west by the Yenisei River, on th...

Queen Elizabeth Islands

(Encyclopedia)Queen Elizabeth Islands, northern part of the Arctic Archipelago, Northwest Territories and Nunavut, N Canada. Ellesmere Island (the largest), the Parry group (Melville, Bathurst, Devon, Prince Patric...

Yablonovy Range

(Encyclopedia)Yablonovy Range yäˈblənəvē [key], mountain chain, in Transbaykalia, SE Siberian Russia. Forming part of the watershed between the Arctic and Pacific oceans, it extends c.700 mi (1,130 km) from th...

Cook, Frederick Albert

(Encyclopedia)Cook, Frederick Albert, 1865–1940, American explorer and physician, b. Sullivan co., N.Y. Cook early became interested in the arctic and accompanied the expedition of Robert E. Peary in 1891–92 as...

Nordenskjöld, Nils Adolf Erik, Baron

(Encyclopedia)Nordenskjöld, Nils Adolf Erik, Baron nĭls äˈdôlf āˈrĭk no͞orˈdənshöld [key], 1832–1901, Swedish geologist and arctic explorer, first to navigate the Northeast Passage, b. Finland. He ser...

fox, in zoology

(Encyclopedia)fox, carnivorous mammal of the dog family, found throughout most of the Northern Hemisphere. It has a pointed face, short legs, long, thick fur, and a tail about one half to two thirds as long as the ...