INTRODUCTION 



Certain groups of books, though dealing with different 

 subjects, it has been found convenient not to disperse. These 

 are denoted by distinctive letters placed immediately before 

 the class numbers. Thus : 



B.M. = British Museum publications. 



p.s. = Palaeontographical Society's publications. 



R.S. = Koyal Society's publications. 



Eef. = Reference books, bearing red labels, and not to be 



removed from the library. 

 /. = folio books, placed on special shelves. 



It is, of course, not expected that readers can remember 

 all the numbers corresponding to the different subjects. A 

 full alphabetical index of classes and sub-classes is appended, 

 forming a key, not merely to this catalogue, but to the books 

 themselves as they stand on the shelves, where the order of 

 ascending decimals coincides exactly with that followed in 

 the catalogue. Periodicals and transactions are, however, 

 shelved apart from books of a non-serial character. 



A second index is added of author's names. 



The different lists have had the benefit of revision by the 

 teachers of the several subjects. 



P. J. A. 



December, 1906. 



Xll 



