Page:The Formation of Vegetable Mould through the Action of Worms (1881).djvu/332

318 *Digestion of worms, 37
 * extra-stomachal, 43
 * Disintegration of rocks, aided by worms, 240
 * Distribution of worms, 120
 * Down, amount of earth here brought annually to the surface, 137
 * Downs near Winchester, valleys in, 301
 * Dust, distance transported, 235–237


 * Earth, amount of, brought to the surface by worms, 129
 * amount of, which flows down a given slope, 266
 * swallowed as food, 100
 * weight of, ejected from a single burrow, 160
 * Eisen, number of species of worms, 9
 * depth of burrows, 110
 * Ejection of castings, 116
 * Embankments on hill-sides, 278, 282
 * Encampments, ancient, 290
 * Ernst, Dr., on worms at Caracas, 121
 * Excavation of the burrows, 98


 * Fabre, M., on the instincts of Sphex, 93
 * Farrer, Mr. T. H., on the Roman villa at Abinger, 178–188
 * Fat eaten by worms, 36
 * Fields formerly ploughed, 292
 * Fish, Mr., criticisms on my views, 6
 * Flints, standing vertically in the residue over the chalk, 138
 * acted on externally and internally by atmospheric agencies, 245
 * Flowing down of castings, 261
 * Fluid, digestive, of worms, 37