INDEX. 



A'ai Sto ruins, 63 



Abbott, C. C, cited, 4, 236, 246, 250 ff. 



Abbott (Judge), 84 



Acacia, 21 



Accidents, effect upon tree-growtli, 124, 134 



Accumulated moisture, effect on tree-growth, 114, 164 



Africa, asylum of Pliocene life, 288 



pre-Devonic glacial deposits in, 290, 291 

 Age of trees, corrective factor for, 124 ff. 

 Agriculture, effect on civilization, 220 

 in Arizona, 9, 10, 12 

 Chaco Canyon, 80 f. 

 lower Santa Cruz Valley, 54 

 northwestern New Mexico, 70 ff. 

 Pajarito Plateau, 91, 93 

 ■tropica, handicaps of, 231 f. 

 Yucatan, 180 

 on artificial terraces, 60 

 terraces, 68 ff. 

 Agua Caliente, ruins at, 52 

 "Aguadas" in Yucatan, 177, 184 

 AguUera, J. G., 100 

 Ahau, in Maya chronology, 227 

 Ahpula, Maya chief, 228 

 Alamo San Francisco, ruins, 66 

 Alamogordo,' fault at, 38 

 well at, 38 

 Alluvial fans, 19 

 Alps, Miocene, 284 



Paleozoic, 278, 287 

 Altar, pottery at, 65 



River, length of, 50 

 Altitude, effect upon civilization, 219 

 America, North and South, united in Miocene, 284 

 Amerinds (see Hohokam), 48 

 Ammonites, distribution of, in Jurassic, 281 



Triassic, 280 

 Angiosperms, rise of, in Lower Cretacic, 282 

 Upper Cretacic, 283 

 Animas Dam, 70 

 Animas Valley, ruins in, 70 ff. 

 Ajitelope, sufferings from drought, 71 

 Antillean Mountains, 283 

 Anti-pleions, 244 ff. 

 Appalachian Mountains, 278, 283, 287 

 Arboreal vegetation, 21 

 Archffiocyathinse, 275, 276, 291, 295 

 Arches in Yucatan, 186 



Architecture, as a mean3 of determining chronology, 226 ff. 

 in Yucatan, 183, 186 

 of Hohokam, 47, 63 



ruins in northwestern New Mexico, 77 ff. 

 Pajaritan Plateau, 83 

 sequence of, among Mayas. 229 f . 

 Arctowski, H., cited, 137, 244 ff. 

 Arequipa, changes of temperature at, 247 



solar constant at, 246 

 Aridity, Lower Devonic, 277 



relation to glaciation, 259 

 Siluric, 277 

 Arizona: 



Capacity for supporting population, 50 

 Climate of, 9 ff., 101 

 Experiment station, 50 

 Ruins in, 47 ff. 

 Scenery of, 15 ff. 



Arrhenius, cited, 234 



Artesa, ruins at, 61 . ,_, „ 



Asia, climatic changes compared with America, 171 ff. 



Assyria, compared with Mayas, 184 



Astronomical knowledge of Mayas, 228, 229 



Atlantic forests of Guatemala, 216 ff. 



Atmospheric pressure in polar regions, 206 



Australia, latest Proterozoic glaciation of, 269, 270, 291 



Azalea, habitat of, 141 



.\zcapotzalco, excavations at, 97 



Aztecs, architecture of, 98 



migration to Mexico, 96 



ruins of, 97 



Bacalar, ruins at, 229 

 Bahada, 18 !., 24 ff. 



At Magdalena Trinchera, 69 

 Bakersfield, rainfall of, 157 f. 

 Ball court in Yucatan, 230 

 Banana plantations in Guatemala, 216 f. 

 Bandai-San, eruption of, 250 

 Bandelier, A. F., cited, 207 f. 

 Baobab, age of, J39 

 Barometric pressure: 



Relation to changes of climate, 137 

 storm tracks, 191 

 tree growth, 171 

 Barren, J., cited, 23, 28, 235 



On climatic evidence of sediments, 273 

 Basin ranges, 15 



Batavia, changes of temperature at, 248 

 Baul, ruins at, 219 

 Beard's ranch, ruins at, 72 

 Beasts of burden, absence among Mayas, 187 

 Beech, conditions favorable to growth, 134 

 corrective factors of, 132 

 curve of growth, 133 

 Bigelow, F. H., cited, 241 



Big Trees of California (see Sequoia washingtomana), 131 

 Biologic evidence as to climate, 275 

 Black color in sediments as evidence of climate, 273 

 Black welder (see Willis), 271 

 Blake, cited, 91 

 Blanceneaux, F., cited, 217 

 Blazer, A. M., cited, 45 

 Boas, F., cited, 97 ff. 

 Bogoslof, eruption of, 251 

 Bokkeveld series, 290 

 Bombay, changes of temperature at, 248 

 Bonillas, Y. S., 100 

 Bonneville, Lake, 37 



Compared with Otero Basin, 38 

 Bonney, cited, 242 

 Bonpland, cited, 96 

 Botanical evidence of desiccation, 92 

 Bovee, Mr., 53, 59 



Bowditch, C. P., cited, 214, 215, 227, 228 

 Bridges, land, 288 

 British Honduras: 



Density of population, 216 

 Physical features of, 211 f. 

 Brown, H., cited, 55 

 Briickner, E., cited, 4, 89, 118, 242 



cycles, 118, 140 

 Buckman, on Triassic ammonites, 280 

 Bulawayo, changes of temperature at, 247 



331 



