ical and pharmaceutcial publications are not catalogued. Of course, 

 when a book is not in our library, we can only judge by the 

 number of pages or the title, and it is possible that we may have 

 indicated some publications as books which are pamphlets, or 

 vice versa. 



Where the book is in our library the data as to number of 

 pages, dates of editions, etc., have been taken from the book and, 

 we" think, can be relied upon as being accurate. Where the book 

 is not in our library, the data have been gathered from other sources 

 and we must disclaim any responsibility for errors. We have 

 indicated the number of pages and the number of plates, but in 

 counting the pages we count only the body of the book, taking no 

 account of preface pages, etc. Our object is to make these cata- 

 logues a practical index of the books and pamphlets. Each entry 

 represents a separate publication. 



We question the utility of the custom resorted to by some 

 libraries of making entries in their catalogues of what should really 

 be cross index matter and giving them the same prominence they 

 give to the volume. Some catalogues which make a very pre- 

 tentious showing would be far less imposing and much more useful 

 if they were catalogues of books in their collection instead of cata- 

 logues of a lot of data regarding the books that are only of secondary 

 importance and should have no prominent place in such a work 



