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Perot, H. Ross

(Encyclopedia)Perot, H. Ross (Henry Ross Perot), 1930–2019, American business executive and political leader, b. Texarkana, Tex., as Henry Ray Perot, grad. Annapolis, 1953. In 1957 he resigned his naval commissio...

King William Island

(Encyclopedia)King William Island, part of the Arctic Archipelago, in the Arctic Ocean, Nunavut Territory, Canada, between Boothia Peninsula and Victoria Island. The northern coast of the island was explored (1831)...

Norrish, Ronald George Wreyford

(Encyclopedia)Norrish, Ronald George Wreyford, 1897–1978, British chemist, Ph.D. Cambridge, 1925. He joined the faculty at Cambridge in 1925 and was a professor there until he retired in 1965. Norrish was awarded...

Searle, Ronald William Fordham

(Encyclopedia)Searle, Ronald William Fordham, 1920–2011, British cartoonist, b. Cambridge. He joined the army as World War II broke out, was captured (1942) by the Japanese at Singapore, and was in the forced lab...

magnetic pole

(Encyclopedia)magnetic pole, the two roughly opposite ends of the planet where the earth's magnetic intensity is the greatest, as the north and south magnetic poles. For the magnetic north, it is the direction from...

McClintock, Sir Francis Leopold

(Encyclopedia)McClintock, Sir Francis Leopold, 1819–1907, British arctic explorer. As a lieutenant in the navy he was assigned to his first arctic service in 1848, when Sir James Clark Ross went in search of the ...

Boothia Peninsula

(Encyclopedia)Boothia Peninsula bo͞oˈthēə [key], 12,483 sq mi (32,331 sq km), Nunavut Territory, Canada; the northernmost (71°58′N) tip of the North American mainland. It is almost an island, being connected...

Baffin, William

(Encyclopedia)Baffin, William, c.1584–1622, British arctic explorer. He was pilot on two expeditions (1615–16) sent out to search for the Northwest Passage under command of Robert Bylot, who was formerly with H...

McClure, Sir Robert John Le Mesurier

(Encyclopedia)McClure, Sir Robert John Le Mesurier, 1807–73, British arctic explorer. He entered the navy and in 1848 accompanied Sir James Clark Ross to the arctic. As a naval captain he was given command (1850)...

Shackleton, Sir Ernest Henry

(Encyclopedia)Shackleton, Sir Ernest Henry, 1874–1922, British antarctic explorer, b. Ireland. The first of his voyages to Antarctica was made as a member of the expedition (1901–4) of Robert F. Scott. Shacklet...