198. Sharp Karren of the Ifenplatte 188 199. The Zirknitz seasonal lake 189 200. Fissure springs arranged at intersections of rock fractures 190 201. Schematic diagrams to illustrate the different types of artesian wells 191 202. Cross section of Geysir, Iceland 192 203. Apparatus for simulating geyser action 193 204. Cone of siliceous sinter about the Lone Star Geyser 194 205. Former shore lines in the Great Basin 198 206. Map of the former Lake Bonneville 199 207. Borax deposits in Death Valley, California 201 208. Hollowed forms of weathered granite in a desert of Central Asia 201 209. Hollow hewn blocks in a wall in the Wadi Guerraui 202 210. Smooth granite domes shaped by exfoliation 203 211. Granite blocks rent by diffission 204 212. “Mushroom Rock” from a desert in Wyoming 205 213. Windkanten shaped by sand blast in the desert 205 214. The “stone lattice” of the desert 206 215. Shadow erosion in the desert 206 216. Cliffs in loess with characteristic vertical jointing 207 217. A cañon in loess worn by traffic and wind 207 218. Diagrams to illustrate the effects of obstructions in arresting wind-driven sand 209 219. Sand accumulating on either side of a firm and impenetrable obstruction 210 220. Successive diagrams to illustrate the history of the town of Kunzen upon the Kurische Nehrung 210 221. View of desert barchans 211 222. Diagrams to show the relationships of dunes to sand supply and wind direction 211 223. Ideal section showing the rising mountain wall about a desert and the neighboring slope 212 224. Dry delta at the foot of a range upon the borders of a desert 213 225. Map of distributaries of streams which issue at the western base of the Sierra Nevadas 213 226. A group of “demoiselles” in the “bad lands” 214 227. Amphitheater at the head of the Wadi Beni Sur 215 228. Mesa and outlier in the Leucite Hills of Wyoming 216 229. Flat-bottomed basin separating dunes 216