Correlation coefficients, earthquakes and sunspots, 291; Jerusalem rainfall and sequoia growth, 83 ff.; rainfall and tree growth, 79 ff. Cosmos, effect of light, 185. Cressey, G. B., cited, 80. Cretaceous, lava, 211; mountain ranges, 44; paleogeography, *201; submergence of North America, 200. Croll, J., cited, 34 ff., 176. Croll's hypothesis, snow line, 139. Crust, climate and movements of, 63, 287, 310; movements of, 43; strains in, 22. Currents and planetary winds, 174. Cycads, 169. Cyclonic hypothesis, 97; loess and, 163; Permian glaciation and, 148; snow line, 139. Cyclonic storms, in glacial epochs, 140 f.; solar electricity and, 243 (_see_ Storms, Storminess). Cyclonic vacillations, 30 f.; nature of, 57 ff. Daily vibrations, 28 f. Danube, frozen, 98. Darwin, G. H., cited, 191. Daun stage, 217. Davis, W. M., cited, 271. Davisson, C., cited, 294, 295, 299. Day, C. P., cited, 239. Day, length of, 18, 191. Dead Sea, palms near, 92. Death Valley, 142. De Ballore, M., cited, 297, 298. Deep-sea circulation, rapidity, 227; salinity and, 176; solar activity and, 179. De Geer, S., cited, 215, 221. De Lapparent, A., cited, 200. Denmark, fossils, 271. "Desert pavements," 161. Deserts, abundant flora of, 171; and pulsations theory, 88 ff.; red beds of, 170. Devonian, climate, 266; mountains, 209. Dog, climate and, 1. Donegal County, Ireland, 220. Double stars, 272, 280; electrical effect of, 261. Douglass, A. E., cited, 28, 73, 74 f., 84, 85, 107. Dragon Town, destruction of, 104, 108. Drake, N. F., cited, 297, 298. Droughts, and pulsations theory, 87 f.; in England, 102; in India, 104 f. Drumkelin Bog, Ireland, log cabin in, 220. Dust, at high levels, 240. Earth, crust of and the sun, 285-317; internal heat, 212; nature of mild climate, 274; position of axis, 181; rigidity of, 307; temperature gradient, 213; temperature of surface, 8. Earthquakes, and seasons, 294, 297; and sunspots, 288 f.; and tropical hurricanes, 300; and wandering of pole, 304 f.; cause of, 307; compared with departures from Eulerian position, 306; seasonal distribution of, 299; seasonal march, 295. "Earthquake weather," 298. East Africa, mild climate, 219. East Indies, earthquakes of, 296. Eberswalde, tree growth at, 102 f. Ecliptic, obliquity of, 217. Electrical currents, in solar atmosphere, 261. Electrical emissions, variation of, 275. Electrical hypothesis, 150, 250 f., 256 ff. Electrical phenomena, storminess and, 56. Electricity, and earthquakes, 292; solar, 243. Electro-magnetic hypothesis, 244. Electrons, solar, 56; variation of, 256. Electro-stellar hypothesis, 274. Elevation, climatic changes and, 39. Engedi, palms in, 92.