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[Material received between Dec. 1908 and Nov. 1909.] 



The International Catalogue of Scientific Literature is in effect a 

 continuation of the Royal Societj^'s Catalogue of Scientific Papers vf\\\ch 

 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 ali'eadybeen 

 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. The volumes for Pure Mathematics and Mechanics are 

 published. The Subject Index for Physics is in preparation. 



