2 7 



his Agriculture 15. When more room is 

 wanted for Botany, the other two subjects 

 are moved one press further on, leaving 

 the press formerly occupied by Horticulture 

 vacant for the Botanical additions. The 

 numbering of the presses is altered, but 

 not the numbering of the books, and the 

 catalogue is not interfered with. The 

 respective subjects thus never get out of 

 due numerical succession; and when, on 

 the opening of the new library in 1857, 

 the books thus numbered were brought 

 from their former confined quarters, and 

 spread over a far larger area, the removal 

 was effected without the alteration of a 

 single press-mark. As the books in any 

 one press may thus come to occupy an- 

 other, it is, as observed by Mr. Winter 

 Jones, essential that all presses should be 

 exactly of the same dimensions. 



