322 INDEX. 



Hensen on number of worms living in a given area, 161 



on the composition of mould, 240 



on the amount of humus formed by two 



worms, 314 

 Henslow, Prof., on ledges on hill-sides, 281 

 Hoffmeister, number of species of worms, 9 



on worms hybernating in company, 35 



perception of light by worms, 20, 22 



on the enemies of worms, 65 



depth of burrows, 112 



-j on hybernation of worms, 116 



Hooker, Sir J., on ledges of earth on the Himalaya, 281 

 Horner, Mr., on castings in a cellar, 108 

 Humus acids, action of, on rocks, 242, 247 



Instinct of worms, 36 

 Intelligence of worms, 36, 66 

 Intestines of worms, their contents acid, 52 

 Islands' inhabited by worms, 122 



Johnson, Dr. H., on the Roman remains at Wroxeter, 

 224-230 



on ammonia in worm-castings, 244 



Johnson, S. W., ■ How Crops Feed,' 244 

 Joyce, Rev. J. G., on the Roman remains at Silchester, 203 

 Julien, Mr. A. A., on the composition of peat, 240 

 on the humus-acids, 242, 247 



Key, Rev. H., on the burial of cinders by worms, 148 

 King, Dr., on the formation of mould in forests in 



France, 5 



on castings near Nice, 108, 119 



on great castings on the Nilgiri Mountains 



and in Ceylon, 128 

 weight of castings near Nice, 165 



