faced star, and may be seen at a glance in looking through the 

 catalogue. It is gratifying to us to be able to show such a large 

 proportion of them now in our library, and we are systematically 

 endeavoring to acquire those that are missing. 



Two sizes of type are used, the large size indicating books or 

 volumes and the small size indicating the pamphlets. We only 

 catalogue as pamphlets those that have been issued as separate 

 publications, or those that are taken from some book or serial pub- 

 lication not devoted exclusively to the subjects of our library. A 

 large number of pamphlets which are merely excerpts from botan- 

 ical and pharmaceutical 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 in- 

 dicated the number of pages and the number of plates, but in count- 

 ing the pages we count only the body of the book, taking no account 

 of preface pages, etc. Our object is to make these catalogues a 

 practical index of the books and pamphlets. Each entry represents 

 a separate publication. 



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