+The Aggradational Work of Running Water+ 177 Principles involved, 177. _The Deposits_ 181 Types, 181. Alluvial fans and cones, 181. Ill-defined alluvium, 183. Alluvial plains, 184. Flood-plains due to alluviation, 186. Flood-plains due to obstructions, 188. Levees, 188. Flood-plain meanders, cut-and-fill, 190. Scour-and-fill, 194. Materials of the flood-plain, 196. Topography of the flood-plain, 196. Topographic adjustment of tributaries, 197. River-lakes, 198. Deltas, 198. Delta lakes, 204. +Stream Terraces+ 204 Due to inequalities of hardness, 204. Normal flood-plain terraces, 205. Flood-plain terraces due to other causes, 208. Discontinuity of terraces, 209. Termini of terraces, 210. CHAPTER IV. THE WORK OF GROUND (UNDERGROUND) WATER. Conditions influencing descent of rain-water, 213. Supply of ground-water not altogether dependent on local rainfall, 215. Ground-water surface—water table, 215. Depth to which ground-water sinks, 216. Movement of ground-water, 220. Amount of ground-water, 221. Fate of ground-water, 221. +The Work of Ground-water+ 222 _Chemical Work_ 222 Quantitative importance of solution, 223. Deposition of mineral matter from solution, 225. _Mechanical Work_ 226 +Results of the Work of Ground-water+ 226 Weathering, 226. Caverns, 227. Creep, slumps, and landslides, 231. _Summary_ 232 +Springs and Flowing Wells+ 234 Mineral matter in solution, 235. Geysers, 236. Artesian wells, 242. CHAPTER V. THE WORK OF SNOW AND ICE. +Snow- and Ice-fields+ 244 The passage of snow into névé and ice, 246. Structure of the ice, 247. Texture, 247. Inauguration of movement, 248. +Types of Glaciers+ 251 +The General Phenomena of Glaciers+ 256 Dimensions, 256. Limits, 258. Movement, 259. Conditions affecting rate of movement, 261. Likenesses and unlikenesses of glaciers and rivers, 262. +Surface Features+ 266 Topography, 266. Surface moraines, 266. Relief due to surface débris, 268. Dust-wells, 269. Débris below the surface, 272.