PKEFACE 



TO THE REVISED AND ENLARGED EDITION 

 OF VOL. II. 



To the statements made in the preface to the first volume 

 of this revised edition, there must here be added a few hav- 

 ing special reference to this second volume. 



One of them is that the revision has not been carried 

 out in quite the same way, but in a way somewhat less com- 

 plete. When reviewing the first volume a friendly critic, 

 Prof. Lloyd Morgan, said : — 



" But though the intellectual weight has also been augmented, it 

 is an open question whether it would not have been wiser to leave 

 intact a treatise, &c. . . . relegating corrections and additions to 

 notes and appendices." 



I think that Prof. Morgan is right. Though at the close 

 of the preface to volume I, I wrote : — " in all sections not 

 marked as new, the essential ideas set forth are the same as 

 they were in the original edition of 1864," yet the reader 

 who has not read this statement, or does not bear it in mind, 

 will suppose that all or most of the enunciated conceptions 

 are of recent date, whereas only a small part of them are. 

 I have therefore decided to follow, in this second volume, a 

 course somewhat like that suggested by Prof. Morgan- 

 somewhat like, I say, because in sundry cases the amend- 

 ments could not be satisfactorily made by appended notes. 



