1829-1912  Related Paintings of william r clark :. | cooks fartyg endeavour uar battre utrstat for vetenskapliga andamal an nagot fortyg dessforin nan | amerikanen charles hall dog av hjartslag,da han forsta gangen forsokte na nordpolen 1871 | i sin dagbok skrev hanno | carsten niebuhr var den ende av fem danskar som kom levande fran en resa till arabien ar 1761 | cook dodades av hawaianer i febri 1779 |
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proverb
1150 - 80. In North America the best-known collection is probably Poor Richard's, an almanac published 1732 - 57 by Benjamin Franklin. In North America may be the most famous collection of Richard are poor, and the publication of one year from 1732 to 1757 by Benjamin Franklin.
William Morris Davis
February 12, 1850 - February 5, 1934,Davis, who was born in Philadelphia, Pennsylvania, was educated at Harvard. He returned to teach there in 1877 after a period as a meteorologist in Argentina and as an assistant with the North Pacific Survey. He became professor of physical geography in 1890 and of geology in 1898. Davis is acknowledged as the founder of geomorphology, the study of landforms. In his The Rivers and Valleys of Pennsylvania (1889) he first introduced what later became known as the Davisian systems of landscape analysis. His aim was to provide an explanatory description of how landforms change in an ideal situation and his most important contribution to this was his introduction of the cycle of erosion into geographical thought. He proposed a complete cycle of youth, maturity, and old age to describe the evolution of a landscape. In youth rivers occupy steep V-shaped valleys while in old age the valleys are broad. The end product would be a flat featureless plain he called a epeneplaine. This was an ideal cycle but in practice the cycle would invariably be interrupted by Earth movements. It was, nevertheless, strongly attacked by German geographers who objected to it on the grounds that it neglected such vital factors as weathering and climate in transforming the landscape. They also believed him to be undermining their argument that landforms could only be discovered by local fieldwork and the production of regional monographs. Davis also produced an influential work,
Palmer, Pauline
American, 1867-1938