230. Billowy surface of the salt crust on the central sink of the desert of Lop 217 231. Schematic diagram to show the zones of deposition in their order from the margin to the center of a desert 217 232. Mounds upon the site of the buried city of Nippur 218 233. Exhumed structures in the buried city of Nippur 218 234. Section across the High Plains 219 235. Section across the lenticular threads of alluvial deposits of the High Plains 220 236. Distributaries of the foot hills superimposed upon an earlier series 220 237. Character profiles in the landscapes of arid lands 220 238. Rain sculpturing under control by joints 224 239. Sagging of limestone above joints 224 240. Map of the joint-controlled Abisko Cañon in Northern Lapland 225 241. Map of the gorge of the Zambesi River below Victoria Falls 225 242. Controlled drainage network of the Shepaug River in Connecticut 226 243. A river network of repeating rectangular pattern 226 244. Squared mountain masses which reveal a distribution of joints in block patterns of different orders 228 245. Island groups of the Lofoten Archipelago 229 246. Diagrams to illustrate the composite profiles of the islands on the Norwegian coast 229 247. Diagram to show the nature of the motions within a free water wave 231 248. Diagram to illustrate the transformation of a free wave into a breaker 232 249. Notched rock cliff and fallen blocks 233 250. A wave-cut chasm under control by joints 233 251. Grand Arch upon one of the Apostle Islands in Lake Superior 234 252. Stack near the shore of Lake Superior 234 253. The Marble Islands, stacks in a lake of the southern Andes 235 254. Squared stacks revealing the position of the joint planes on which they were carved 235 255. Ideal section cut by waves upon a steep rocky shore 236 256. Map showing the outlines of the island of Heligoland at different stages in its history 236 257. Ideal section carved by waves upon a steep shore of loose materials 237 258. Sloping cliff and boulder pavement at Scituate, Massachusetts 237