INTERNATIONAL SCIENCE. 



495 



Subscribers ma^^ either obtain complete sets or any of the separate 

 volumes. The relative popularity of the different subjects is illus- 

 trated by the preceding table, which gives in the different columns 

 for each science the volumes ajiproximateh^ required by each country. 

 The figures are of course subject to variations from year to year. 

 The first column shows the numbei- of complete sets subscribed for in 

 addition to the separate volumes: these presumabl}^ find their way 

 into university or public libraries. 



The popularitj'^ of the special botanical catalogue is remarkable. 



We may obtain a rough idea of the scientific activity of different 

 countries by comparing the number of slips received from them 

 during a certain interval. The numbers given in the report i;)ub- 

 lished by the international convention held in London last summer 

 and referring to all slips received, are shown in the following table. 



The total number up to March, 1906, has increased to 700,000. 



Austria 



Belgium 



Canada 



Denmark 



Finland 



France 



Germany 



Holland 



Hungary 



India and Ceylon . . 



Italy 



Japan 



New South Wales . . 



New Zealand 



Norway 



Poland 



Russia 



South Africa 



South Australia 



Sweden 



Switzerland 



United Kingdom... 



United States 



Victoria (Australia) 



Total 



The catalogue begins with the year 1901, but some countries send 

 in their slips rather earlier than others, so that the time interval 

 covered by the investigations to which the table refers is not quite 

 the same for all. Nevertheless, the numbers shown in the table 

 possess a certain interest. I have given in the la.st two columns the 

 iiumber of journals which different countries take into account and 



