Such is, in its main features, the system 

 of book-press arrangement which I have 

 undertaken to describe. I have no fear 

 but that it will be pronounced in essentials 

 logical and philosophical. It has un- 

 doubtedly proved eminently convenient in 

 practice. That it should be open to re- 

 vision on some points is inevitable from 

 the nature of things, and from two circum- 

 stances more especially — its gradual deve- 

 lopment as subject after subject was added 

 to the library, and the degree in which 

 it represents the idiosyncrasy of a single 

 mind. Some minor oversights must be 

 admitted. Geology, for example, should 

 unquestionably have preceded Botany. I 

 venture more extensive criticisms with 

 hesitation, yet I cannot help remarking 

 that I perceive no valid reason for the 

 severance of so manifest a branch of His- 



