2. 



[Material received between June 1906 and Sept. 1907, J 



The International Catalogue of Scientific Literature is in effect a 

 continuation of the Royal Society's Catalogue" of Scientific Papers which 

 will, when completed, consist of an Author Catalogue and Subject 

 Index covering the period of 1800-1900. Twelve quarto volumes of 

 the Author Catalogue covering the period 1800-1883 have already' been 

 published; the volumes for 1884-1900 are in course of preparation. 

 The Subject Index will be issued separately for each of the 

 seventeen sciences dealt with in the International Catalogue of 

 Scientific Literature, and will be arranged in accordance with its 

 Schedules. Tlie volume for Pure Mathematics is now published. 



