297. Succession in aeolian soils 246 298. Succession in glacial soils 247 Secondary Successions 299. 247 300. Succession in eroded soils 247 301. Succession in flooded soils 248 302. Succession by subsidence 249 303. Succession in land slips 249 304. Succession in drained or dried soils 249 305. Succession by animal agency 250 306. Succession by human agency 250 307. Succession in burned areas 251 308. Succession in lumbered areas 252 309. Succession by cultivation 253 310. Succession by drainage 253 311. Succession by irrigation 253 312. Anomalous successions 254 313. Perfect and imperfect successions 254 314. Stabilization 255 Causes and Reactions 315. 256 316. Succession by preventing weathering 257 317. Succession by binding aeolian soils 258 318. Succession by reducing run-off and erosion 259 319. Succession by filling with silt and plant remains 260 320. Succession by enriching the soil 261 321. Succession by exhausting the soil 262 322. Succession by the accumulation of humus 263 323. Succession by modifying atmospheric factors 264 Laws of Succession 324. 264 Classification and Nomenclature 325. Basis 267 326. Nomenclature 267 327. Illustrations 270 Investigation of Succession 328. General rules 270 329. Method of alternating stages 271 330. The relict method 272 THE STRUCTURE OF THE FORMATION