THE PRINCIPLES OF SCIENCE 



A TREATISE ON LOGIC 



AND 



SCIENTIFIC METHOD. 



BY 



W. STANLEY JEVONS, M.A., F.E.S., 



FELLOW OF UNIVERSITY COLLEGE, LONDON; 

 PROFKSSOR OF LOGIC AND POLITICAL ECONOMY IN THE OWENS COLLEGE, MANCHJiSTFR. 



SPECIAL AMERICAN EDITION, 



MACMILLAN AND CO. 



1874. 



[The Piylit of Translation and Reproduction is reserved.] 



