STUDIES 



SCIENTIFIC &> SOCIAL 



BY 



ALFRED RUSSEL WALLACE 



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



IN TWO VOLUMES. VOLUME II 



WITH NUMEROUS ILLUSTRATIONS 



m 



MACMILLAN AND CO., LIMITED 



NEW YORK: THE MACMILLAN COMPANY 

 IQOO 



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