XUl 



If the reader remember the name of the Author of a paper on a 

 given subject, he will probably fiud it convenient to refer to the 

 Authors' Catalogue rather than to the Subject Catalog'ue. 



In the Authors' Catalogue the numbers placed within square brackets 

 at the end of each entry are Registration numbers, and serve to 

 indicate the scope of each paper indexed. The meaning of these 

 numbers will at once be found by reference to the Schedule. 



In case the abbreviated titles of Journals are not understood, a key 

 to these is provided at the end of the volume. 



GEOGRAPHICAL SYMBOLS. 



When one or two letters printed in italics immediately follow the 

 registration number, these letters denote geogi-aphical position. The 

 meaning of these geographical symbols will be found in the system of 

 Topographical Classification which, in this volume, is printed in four 

 languages, and placed between the Schedules and the Authors' 

 Catalogue. Thus fg means " occiUTing in South Africa " or " with 

 reference} to South xVfrica." 



