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320 *Henslow, Prof., on ledges on hill-sides, 278
 * Hoffmeister, number of species of worms, 9
 * on worms hybernating in company, 34
 * perception of light by worms, 20, 22
 * on the enemies of worms, 62
 * depth of burrows, 110
 * on hybernation of worms, 114
 * Hooker, Sir J., on ledges of earth on the Himalaya, 278
 * Humus acids, action of on rocks, 240, 244


 * Instinct of worms, 35
 * Intelligence of worms, 35, 64
 * Intestines of worms, their contents acid, 51
 * Islands, inhabited by worms, 120


 * Johnson, Dr. H., on the Roman remains at Wroxeter, 222–228
 * on ammonia in worm-castings, 242
 * Johnson, S. W., 'How Crops Feed,' 242
 * Joyce, Rev. J. G., on the Roman remains at Silchester, 201
 * Julien, Mr. A. A., on the composition of peat, 238
 * on the humus acids, 240, 244


 * Key, Rev. H., on the burial of cinders by worms, 146
 * King, Dr., on the formation of mould in forests in France, 5
 * on castings near Nice, 106, 117
 * on great castings on the Nilgiri Mountains and in Ceylon, 126
 * weight of castings near Nice, 163
 * on disintegrated castings on the Corniche road, 276, 281
 * on the washing away of the castings on the Nilgiri Mountains, 274