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agriculture altitude amount animals anticyclones Appalachian Mountains Atlantic atmosphere average basins Canal cities climate clouds coal coast commercial continental continental shelves crops cyclones deposits desert dew point Diagram distribution earth east eastern effect equator equatorial erosion evaporation favorable feet forests Geog glacial glaciers Greenland ground-water harbor heat humidity important inches increased industry interior irrigation islands isobaric isotherms Lake Lake Michigan land less lower manufacturing Map showing middle latitudes miles mineral Mississippi Mississippi River moisture mountains movement navigation nearly North America northern hemisphere ocean places plains plants plateaus population pressure railroads rain rainfall regions rivers rock sea-level season sediment slopes snow soil southern square miles streams summer surface Surv temperature tion trade-wind tropical type of rainfall U. S. Geol United valleys volcanic water power water vapor waves weather western winds winter York
Page 573 - The official classification, which, speaking generally, applies in the territory east of the Mississippi River and north of the Ohio and Potomac Rivers...
Page 461 - Shaler says that in Great Britain and Ireland fully one-fifth of the most fertile agricultural lands has been reclaimed by drainage, and that one-twentieth of the now tillable land in Europe was inundated and unfit for agriculture in the eighth century.
Page 58 - The greater the angle of the sun's rays, the greater the heat. The angle at which the sun's rays reach the earth varies from place to place, and from time to time at the same place. This is a result of the inclination of the earth's axis, and is illustrated by Figs.
Page ii - Course, 902 pp. 8vo. $3.50 net. 10. Geology. By THOMAs C. CHAMBERLIN and ROLLIN D. SALISBURY, Professors in the University of Chicago.
Page 154 - The part of the earth between the Tropic of Cancer on the north, and the Tropic of Capricorn on the south is the Torrid zone, so called on account of the excessive heat that always prevails there.
Page 441 - Although a very large amount of welding still is done with ordinary shielded electrodes, in recent years there has been a great increase in the use of other methods of shielding, largely because they permit the use of continuous electrodes and automatic electrode- feeding devices.
Page 271 - Next to oxygen, silicon is the most abundant element in the earth's crust.
Page 97 - Rain clouds; a thick layer of dark clouds, without shape and with ragged edges, from which continued rain or snow generally falls. Through the openings of these clouds an upper layer of Cirro-Stratus or Alto-Stratus may almost invariably be seen. If the layer of Nimbus separates...