Irrigation, 153, 154, 179, 180 

 Irritability of living matter, 95 

 Isostasy, 40, 41 

 Italy, deaths in, 158, 160, 164, 165 



in, a 



Japan, optimum temperature 

 shown by death-rate, 167 

 Japanese, 149, 169 

 Java, 188 



irrigation in, 180 

 Jefferson, Thomas, 74 

 Jelly-fishes, 114 

 Johnston and Williamson, 52 

 Jupiter, 5, 6, 31 

 Jurassic, Lower, 145 



period, 46, 76, 79, 111, 130, 131 



Upper, 127, 129, 145 

 Juvenile waters, 38, 75 



Kankakee uplift, 62 

 Kant, hypothesis of, concerning evolu- 

 tion of solar system, 10 

 Kelvin, 96 

 Kircher, 90 



Labrador, fishermen of, 152 



Lamprey, 116 



Land-bridges, 73, 74, 138 



Land waters, as place of chordate 



origin, 119 

 Lands, contributions of, to oceans, 61 



elevation of, 70, 109, 110, 111 

 Lane's law, 15 

 Laplace, P. S. de, 10, 50 

 Laramide revolution. 111, 132, 134, 145 

 La Tour, C. de, 93 

 Laurentian peneplain, 118 

 Lava, 2, 38, 44, 75 

 Lavas, of moon, 43 



Proterozoic, 64 

 Law of Complexity, 101 

 Lehman and Pedersen, 172 

 Leith and Mead, 60 

 Lepidosiren, 122 



INDEX 20I 



Leverrier, U. J. J^ 27 

 Lewes, 86 

 Lias, climate of, 55 

 Life, 88 



ancient, 59 



Archeozoic, 63 



as manifestation of protoplasmic 

 activity, 82 



changes in, 73 



chemical elements essential to, 105 



chemical elements of, grouping of, 

 105 



communal, 144 



cycles in, 73 



definitions of, 85 



dormant, 97 



elements, coordination of, 105 



elements, grouping of, 105 



elements, in colloidal suspension, 106 



evolution of, 64 



fresh-water record of, 59 



land record of, 59 



marine, increase in, 78 



marine, record of, 59 



materials at basis of, 51 



origin of, 63, 82, 94, 112 



paleontological record of, 93 



pulse of, 81, 109, 111, 144, 146 



scientific explanation of, 95 



thermometers, 55 



transportation of, through space, 96 



vehicle of manifestations of, 85 

 Light, radiation pressure of, 97 

 Lightning, 102, 103 

 Limbs, change in, in primates, 143 

 Lime-secretion, establishment of, 113 

 Limestones, 58, 60, 61, 67, 68 

 Lincoln, A., 182 

 Lithosphere, 41, 49, 50, 75, 76 



density differences in, 41 

 Lizards, bipedal, 130 



frilled, 130 

 Llama, 178 

 Locusts, 90 



