Civilization, influence of climate on, 213-224; mistaken idea of change of climate and, 229; must migrate with shifting of climatic belts, 240 Cleveland, President Grover, appoints Prof. Moore chief of Weather Bureau, 306 Climate, 161-187; difference between weather and, 161; changes in, 161; how it is modified and controlled, 188-212; its influence on civilization, 213-224; has our, changed?, 225-244; influence of forests on, 240-244; controlling factors of American, 243, 244; how to find the, you seek, 249-252; of Cuba, 252, 253; of Porto Rico, 253, 254; of the Hawaiian Islands, 254, 255; of the Philippines, 255, 256; of Bermuda compared with Florida and California, 256-261 Climates for health and pleasure, 245-281 Climatic conditions, optimum of, favorable to man, 218, 219 Cloud, temperature as affected by, 172; formation and composition of, 287, 288; difference between mist, rain, fog, and, 288; fundamental formations of, 288; characteristics of the, formations, 288; fog is, at a low level, 288 Cold, contraction of air by, 15; development of man favored by, climate, 224; severest: in North America, 277, 278; in South America, 278; in Europe, 279; in Asia, 280 Coldest and hottest places in the world, 275-281 Cold storage, efficient underground, 183, 184 Cold wave, scavenger of the air, 36, 37; beneficial effects of, 37; great eddies in atmosphere, 118; and speed of storm movement, 123-126; formation of, 124; movement of, 125, 126; detecting approach of, 125; limitations on extent of, 126; warnings of, by Bureau, 126, 127; definition of, 127, 128; maps showing zones of, 127, 128; number of, 128, 129; tempered by Great Lakes, 129, 130; tempered by heat of large cities, 130, 131; influenced by Rocky Mountain Divide, 131; Weather Bureau warnings of, 301, 302 Colorado Desert, Cal., extreme heat in, 277 Columbus, Christopher, and the trade winds, 102 Combustion, rapid in liquid air, 9; nitrogen will not support, 33; and oxygen, 34 Commerce, benefits of Weather Bureau service to, 301, 302 Condensation, and variations in temperature, 163, 164, 282-290 Congelation, 174 Constantinople, Turkey, Christmas Day in, 271 Continents, circulation between oceans and, 105; their influence on climate, 192-198; characteristics of temperature of interior of, 194, 195 Contour of land, and frost, 86-97 Convection, and heat, 54, 55 Copper, nucleus of atom of, 32 Coronas, 141 Cox, Prof. J. H., and observations on frost, 93, 94 Cranberry bogs, and frost, 93-95 Crime, influence of weather conditions on, 215 Cuba, climate of, 252, 253 Cultivation of land surface, and frost, 93-95 Cumulus clouds, 288 Cushing, comparison of temperatures by, 196, 197, 215