/ 



THE FOKMATION 



VEGETABLE MOULD, 



THBOUGH THE 



ACTION OP WORMS 



WITH 



OBSERVATIONS ON THEIR HABITS. 



By CHAELES DAEWIN, LL.D., F.E.S. 



WITH ILLUSTRATIONS 



SIXTH THOUSAND (CORR 



UBFtMtY 



LONDON: 

 JOHN MUEEAY, ALBEMAELE STBEET. 



1882. 



The right of Translation is reserved. 



