PRODUCTION OF RUBBER 



included in the above totals 

 for the years 1903 to 1909 

 are given in the table on 

 this page. 



The total production of 

 rubber in Brazil showed a 

 gradual increase from 31,712 

 metric tons in 1903 to 39,020 

 metric tons in 1909; during 

 the next two years there 

 was a slight decline, followed 

 in 1912 by a considerable 

 rise to 42,285 metric tons. 

 Para rubber forms the main 

 portion of the exports, but 

 there has been a large in- 

 crease recently in the pro- 

 duction of Caucho rubber 

 (Castilloa), which in 1910 

 amounted to over 8,000 met- 

 ric tons. Brazil possesses 

 large reserves of Para trees 

 which have hitherto re- 

 mained unexploited on ac- 

 count of difficulties of labour 

 and transport, but some of 

 these areas will be opened 

 up in the immediate future. 



The principal rubber- 

 producing countries in 

 America, other than Brazil, 

 are Mexico, Peru, and Bo- 

 livia. Some of the rubber 

 obtained in Peru and Bo- 

 livia is brought down the 

 Amazon for shipment, and 

 is therefore included in the 

 exports from BrazH. The 

 following statistics show the 

 quantities of rubber ex- 

 ported from Mexico, Peru, 

 and Bolivia during recent 

 years : 



