PREFACE TO THE SECOND EDITION. n\v 



consider defects in the doctrines of this book, especially in 

 the first part, which treats of deduction. Some of the 

 notices of the work were indeed rather statements of its 

 contents than critiques. Thus, I am much indebted to 

 M. Louis Liard, Professor of Philosophy at Bordeaux, for 

 the very careful exposition ^ of the substitutional view of 

 logic which he gave in the excellent Revue P/iilosophique, 

 edited by M. Piibot. (Mars, 1^77, tom. iii. p. 277.) An 

 equally careful account of the system was given by 

 M. Kiehl, Professor of Philosophy at Graz, in his article on 

 " Die Euglische Logik der. Gegenwart," published in the 

 Vierteljahrsschrift fur tvissenschaftliche Philosophie. ( I Heft, 

 Leipzig, 1876.) I shoidd like to acknowledge also the 

 careful and able manner in which my book was reviewed 

 by the Netv York Dail/j I'ribune and the New York Times. 

 The most serious objections which have been brought 

 against my treatment of logic have regard to my faikire 

 to enter into an analysis of the ultimate nature and origin 

 of the Laws of Thought. The Spectator ~ for instance, in 

 the course of a careful review, says of the principle of 

 substitution, " Surely it is a great omission not to discuss 

 whence we get this great principle itself; whether it is a 

 pure law of the mind, or only an approximate lesson of 

 experience ; and if a pure product of the mind, whether 

 there are any other products of the same kind, furnished 

 by our knowing faculty itself." Professor Eobertson, in 

 his very acute review,^ likewise objects to the want of 



^ Since the above was written M. i>i;ird has republislied this exposition 

 as one chajiter of an interesting and admirably lucid account of the 

 progress of logical science in England. After a brief but cb-ar introduc- 

 tion, treating of the views of llcrschcl, ^Mill, and others concerning 

 Inductive Logic, M. Liard describes in succession the logical ssystems of 

 George Ijenthani, Hamilton, Do Morgan, Boole, and that contained in 

 the jire-sent work. Tlie title of tlie book is as follows : — Lcs Logicieiis 

 Aiujlais C'mtrvijiorains. Par Louis Liard, Professeur de Piiilosophie a 

 la Kaculle des Lettrcs de Bordeaux. Paris : Librairie Geiuier BaiUiere. 

 1878. (Note added November, lSjS.) 



* Spec/altrr, September 19, 1S74, j). 1 1 78. A second portion of the 

 review a[ipearc(l in the same j(jurnii] fur September 26, 1S74, p. 1204. 



^ .\find : a Quarterly ]{evicw of l'.sychology and Philosophy. No. II. 

 April 1876. Vol. I. p. 206. 



