IO2 



THE RUBBER INDUSTRY 



bersome and costly, but the drawbacks to them are 

 more than compensated for by the effective result. 

 Should smoked sheet take the place of pelles or knap- 

 sacks, it is an open question whether the present high 

 standard of grading will be maintained. 



For the twelve months from July i, 1912, to June 30, 

 1913, the crop of rubber in the Amazon Valley was 

 31,731 tons, and to this must be joined the stock of 

 1,500 tons, making a total of 33,231 tons available at 

 Manaos and Para; in addition, the harvest of caucho 

 (castilloa) was 10,131 tons, bringing the aggregate 

 amount to 43,362 tons. The classification of this out- 

 put was 



UPPER RIVERS 



LOWER RIVERS 



* Ball and scrap. 



f From the Araguaya and upper sections of the Tapajoz, 

 Xingu, Tocantins, and Matto Grosso. 



