INDEX. 



333 



Climatic changes — continued : 



Magnitude of changes of rainfall, 167 

 Meteorological explanation of, 236 

 Nature of, 1 



Of geological times, 257 fF. 

 Pulsatory vs. gradual, 88 

 Recorded in Piedmont deposits, 19 

 Relation of gypsum dunes, 41 ff. 

 recent to glacial, 206 

 to cyclonic storms, 170 

 diseases, 224 

 Otero strands, 39 ff. 

 Sequoias as standard for measurement of, 141 ff 

 Solar hypothesis of, 233 



Summary of theory in respect to United States, 87 ff 

 Types of, 233 f. 

 Climatic curve, liability to error, 170 f. 

 cycles, 117 ff, 233 

 theories, methods of testing, 95, 175 

 zones, Jurassic, 281 



shifting of, 172, 189 ff. 

 Cloudcroft, 44 

 Clough, H. W., cited, 118 

 Cloverdale, N. Mex. 70, 71 

 Coal Measures, life of, 277, 278 



Upper Carbonic, 278 

 Coast Range, 141 



redwood, curve of growth, 133 

 Coastal plain of Yucatan, 176 

 Coborca, 87 



Cocospera, terraces of, 26 

 Colds, danger of, 220 

 Coleman, A. P., cited, 23 



On Proterozoic glaciation in Canada, 295, 296 

 Cohma, eruption of, 251 



Color of sediments, as evidence of climate, 273, 274 

 Colorado Canyon, 15 

 Communal houses, Animas Valley ; 71 



near Thoreauj 76 

 Comovavi Mountains, 62 

 Conservation factor in rainfall, 105 ff. 

 Consumption compared with malaria, 220 

 Continental deposits: 

 Lower Cretacic, 282 

 Proterozoic, 275 

 Upper Cretacic, 282 

 Converse Basin, 142 

 Cool period. Lower Cambric, 287 

 Jurassic, 287 

 Ordovicic, 287 

 Triassic, 287; 

 Copan, date of ruins at, 214 f., 227 

 ruins, 218, 229 

 terraces of, 213 ff. 

 vegetation of, 216 

 Cope, cited, 91 

 Copper in Yucatan, 18? 

 Coral reefs, Jurassic, 281 

 Triassic, 280 

 Corn crop of United States, 243 ff. 

 Corn, good years vs. bad, 81 



method of raising in Guatemala, 222 

 ^ . Yucatan, ISO 



Correction for errors in counting rings, 144 ff. 

 flare and buttresses, 154 ff. 

 longevity in deciduous vs. coniferous trees, 

 132 



~ . . Sequoia washingloniana, 151 



Corrective factor: 



According to Caspian Sea, 156 

 For absence of rings, 146 ff. 



age, applied to yellow pine, 129 f. 



of trees, 124 ff. 

 change in number of trees, 127 f. 

 longevity, 127 



applied to yellow pine, 131 f. 



Cortez, 96 

 Covered Wells, 62 

 Creosote bush, 21 

 Cretacic, Lower: 

 Climate of, 282 

 Faunas of, 282 

 Reef corais in, 282 

 Rise of Angiosperms in, 282 

 Seasonal changes in, 287 

 Cretacic, Upper: 



Angiosperms in, 283 

 Climate of, 283, 286, 288 

 Great mortality in, 283 

 Mountain-making in, 283, 288 

 Reef corals in, 283 

 Wood with rings in, 282 

 Critical periods, 286, 287 



and volcanism, 287 

 Crocker's, rainfall at, 159 

 CroU, theory of glaciation, 234 

 Crops, size in past vs. present, 81 



Crustal deformation as cause of climatic changes, 5, 25.'j ff. 

 movements in Guatemala, 213 

 . relation to glaciation, 257 ff. 



Cuautitlan River, change of course of, 97 

 Cultivated plants, escape of, 61 

 Culture: 



Distribution of, in Guatemala, 225 ff. 

 Stages of, in New Mexico, 75 ff., 82 ff., 84 

 Cummings, cited, 91 

 Curd, J. W., cited, 138 

 Cutter, V. M., cited, 217 

 Cycles, barometric, 118 

 of climate, 117 ff. 

 Cyclones related to sun-spots, 237 ff. 

 Cyclonic storms, in New Mexico, 9, 1 1 

 Yucatan, 190 

 relation to changes of climate, 190 ff. 

 growth of Sequoias, 170 

 magnetic variations, 204 f. 

 variations in tracks of, 193 ff. 

 vs. monsoon type of rainfall, 137 



Dalton, 78 



Dam at Animas, 70 



Dark ages of Maya History, 229 f. 



Dates of climatic changes, 43 



Datil National Forest, 128 



David, T. W., cited, 242 



Davis, W. M., cited, 15, 23 



Death rate in England vs. tropical countries, 221 



Deccan lava flows, 283 



Defense, art of, in relation to climatic changes, 56 f. 



Defensive works (see Forts), 80 



Deforestation in Mexico, 96 



Density of population : 



In British Honduras, 216 

 Guatemala, 216 ff. 

 Depopulation in relation to climatic changes, 57 

 Desert conditions of the southwest, 21 

 Laboratory, 52 

 pavements, 24 

 Desiccation (see Climatic changes; Rainfall), 92 

 Devonic : 



CUmate of, 277 

 Coal in, 277 

 Life of, 277 



Mountain-making, 277 

 Volcanoes in, 287 

 Dikes in Mexico, 96, 207 ff. 

 Dillonwood, curves of annual tree growth, 161 



rainfall of, 158 

 Diseases, effect of introduction in tropics, 223 f. 

 of Guatemala, 218 

 tropical lands, 220 

 Disemboque, 66 



