SYSTEM OF LOGIC 



RATIOCINATIVE AND INDUCTIVE 



BEING A CONNECTED VIEW OF THE 

 PRINCIPLES OF EVIDENCE 



AND THE 

 METHODS OF SCIENTIFIC INVESTIGATION 



BY 



JOHN STUART MILL 



IN TWO VOLUMES 

 VOL. I. 



SEVENTH EDITION 



LONDON : 

 LONGMANS, GREEN, READER, AND DYER 



MDCCCLXVIII 



