54 SCIENTIFIC CATALOGUE. 



J V C n S continued. 



" All acts of reasoning" the author says, "seem to me to be dif- 

 ferent cases of one uniform process, which may perhaps be best 

 described as the substitution of similars. This phrase cLarly 

 expresses that familiar mode in which we continually argue by 

 analogy from like to like, and take one thing as a representative 

 of another. The chief difficulty consists in showing that all the 

 forms of the old. logic, as well as the fundamental rules of mathe- 

 matical rasoning, may be explained upon the same principle; and 

 it is to this dijficiilt task I have devoted the most attention. Should 

 my notion be true, a vast mass of technicalities may be swept from 

 our logical text-books and yet the small remaining part of logical 

 doctrine will prove far more useful than all the learning of the 

 Schoolmen." Prefixed is a plan of a new reasoning machine, the 

 Logical Abacus, the constrttciion and working of which is fully 

 explained in the text and Appendix. " Mr. Jevons 1 book is very 

 clear and intelligible, and quite worth consulting." Guardian. 



MaCCOll. THE GREEK SCEPTICS, from Pyrrho to Sextus. 

 An Essay which obtained the Hare Prize in the year 1868. By 

 NORMAN MACCOLL, B.A., Scholar of Downing College, Cam- 

 bridge. Crown 8vo, 3-r. 6d. 



This Essay consists of five parts: I. "Introduction." II. "Pyrrho 

 and Timon." TIL "The New Academy." IV. "The Later 

 Sceptics." V. " The Pvrrhoneans and New Academy con- 

 trasted." "Mr. Maccoll has produced a monograph which merits 

 the gratitude of all students of philosophy. His style is clear and 

 vigorous ; he has mastered the authorities, and criticises them in a 

 modest but independent spirit " Pall Mall Gazette. 



M'Cosh Works by JAMES M'CosH,LL.D., President of Princeton 

 College, New Jersey, U.S. 



" He certainly shews himself skilful in that application of logic to 

 psychology, in that inductive science of the human mind which is 

 the fine side of English philosophy. His philosophy as a whole is 

 worthy of attention." Revue de Ueux Mondes. 



THE METHOD OF THE DIVINE GOVERNMENT, Physical 

 and Moral. Tenth Edition. 8vo. los. d. 



