INDEX 



203 



Mississippian period, aridity in, 145 



period, diastrophism in, 125 

 Mohammed, 151, 182 

 Mohawkian period, 76 

 Molecules, 84, 100 

 Molluscs, 114, 120 



Molten stage, in earth's history, 26, 33 

 Mongolia, 185 

 Mongoloid races, 171 

 Monotremes, 127 

 Moon, 2, 5, 13, 28, 30, 33, 43 



effect of earth on, 30 



effect of, on earth, 28 



in Archeozoic, 63 

 Moon-knot, 47 

 Moore, B., 100 

 Moulton, F. R., 12, 18, 19 

 Mountain-making, 53, 70, 78, 109 

 Mountains, 71 



cycles of, 60 



origin of, 48 

 Muds, 58, 60 

 Mud-skippers, 120 

 Mudstones, 58, 61, 67, 68 

 Mutants, 148 



Nature, uniformity of, 45 

 Nebulae, 8 



irregular, 8 



planetary, 8 



ring, 9 



solar, 21, 47 



spiral, 8, 9, 13, 18, 20, 21, 47 



stellar, 9 

 Nebular hypothesis of Laplace, 10 



hypothesis of Laplace, modifications 



of, 11 



Needham, T., 92 



Negative areas, in earth's surface, 50 

 Negroes, American, adaptation of, to 

 climate, 171 



death-rate of, 164, 168, 169, 171 



effect of tropical climate on, 149 

 Neoceratodus, 121, 122 



Neogene time, 79 



Neopaleozoic time, 79 



Neptune, 4, 5, 6 



Neutral medial area of North America, 

 62 



New Mexico, Indians of, 152 



New York City, death-rate in, 171 



Newfoundland, fishermen of, 152 



Nitrogen, 44, 102, 103 

 compounds, 104, 105 

 in primordial atmosphere, 34 



Nodosaurs, 132 



Nome land-bridge, 74 



Nordics, 149, 169, 171 



North America, in Paleozoic time, map 

 of, 62 



North Carolina, death-rate in, 171 



Nuclei, planetary, 19, 33 



Nythosaurus larvatus, 128 



Oceanic basins, 43 



basins, in Archeozoic, 63 



basins, increase in volume of, 39 



basins, origin of, 39, 49 



basins, relations of crustal density 

 to, 39 



currents, 54 



currents, changes in, 73 



floodings, 61, 71, 75, 76, 79 



floodings, Cretaceous, 77 



floodings, Pennsylvanian, 66 



floodings, Silurian, 72 



level, inconstancy of, 76 



salts, 31, 50, 56 



waters, gathering of, 37 



waters, increase in volume of, 50 



waters, origin of, 55 

 Oceans, carbon dioxide in, 52 



increase in area of, 78 



origin of, 37 



when smallest, 73 



Oligocene time, 46, 111, 135, 136, 145 

 Orang, 139, 140, 142 

 Orbits, planetary, 5, 19 



