INDEX. 



Abinger, Roman villa at, 178 



' castings from Roman viUa, with rounded 



particles, 253 

 Acids of humus, action on rocks, 240 

 Africa, dust from, 235 

 Air, currents of, worms sensitive to, 28 

 Amount of earth brought to the surface by worms, 129 

 Ajits. intelligence of, 93 

 Archiac, D', criticisms on my views, 4 

 Artemisia, leaves of, not eaten by worms, 33 

 Ash-tree, petioles of, 79 



Beaulieu Abbey, burial of the old pavement, 193 

 castings from, with rounded particles, 



255 

 Beaumont, Elie de, on vegetable mould, 2 

 the rubbish underlying great cities, 



178 



the transport of dust, 237 



the permanence of mould, 289 



the permanence of ancient tumuli, 290 



Beech-forests, stones not buried under by castings, 144 

 Bengal, worms of, 123 



Bones, crushed, burial of, under castings, 146 

 Brading, Roman villa at, 199 



, castings from, with rounded particles, 254 



