6 



CONT i 



PA OK. 



XIII. COURSES OF TIU: BAxra'f HOOHBT, 74 



How the formations are arranged. 



XIV. A W\I.K IN TMK YELLOWSTONE I 'AUK, 79 



Thermal Wa: 



XV. AMO\; TIII: Yoi < AN<T.S, 85 



Indications of Internal Fires. 



XVI. Fuo/; 9 LAVA, 01 



Ancient Lavas. 



XVII. IMPRISONED HEAT, 96 



Internal Condition of the Earth. 



XVIII. THE UNSTABLE LAND, 102 



Phenomena and Causes of Earthquakes. 



XIX. THE KKAMEWORK OF THE MOUNTAINS, 108 



Mountain Structures. 



XX. How THE MOUNTAIN FRAMEWOUK is REARED . . 113 

 Mountain Formation. 



XXI. DOWN IN A MINE, 119 



Modes of Occurence of the Metals. 



XXII. THE Ki.\<; OF METALS, 125 



Iron and Its Geology. 



XXIII. THE CRYSTALS OP THE SEA, 130 



Salt and Gypsum. 



XXIV. LIQUID SUNLIGHT, 135 



Petroleum. 



XXV. GASEOUS SUNLIGHT, 141 



Natural Gas Its Wonders and its Geology. 



XXVI. SOLIDIFIED SUNLIGHT, 149 



Coal and Coal-Beds. 



Jtat 



XXVII. MONSTERS OF A BURIED WORLD, 154 



Extinct Quaternary Mammals. 



XXVIII. Till: Cl MKTERIES OP THE BAD LANDS, 1(,1> 



:iary Fossils. 



XXIX. LOM I LIMP or CHALK, Ki7 



zoic Rocks and Fossils. 



