HABIT AND INTELLIGENCE, 



"^:'.\ \\\ 



IN THEIR CONNEXION 

 WITH THE LAJFS OF MATTER AND FORCE: 



A SERIES OF SCIENTIFIC ESSAYS. 



BY 



JOSEPH JOHN MURPHY. 



IN TWO FOZUMEi,\ 

 VOL. I. 



MACMILLAN AND CO. 



1^69. 



[The Uiijht rif TiViisIalioH nnd licprodudion is irscnrr!.] 



