STUDIES 



SCIENTIFIC W SOCIAL 



BY 



ALFRED RUSSEL WALLACE 



LL.D., D.C.L., F.R.S., ETC. 



IN TWO VOLUMES.— VOLUME II 



WITH NUMEROUS ILLUSTRATIONS 



Hontion 

 MACMILLAN AND CO, Limited 



NEW YORK: THE MACMILLAN COMPANY 

 1900 



All rights reserved 



Jr 



