86 



RUBBER AND 



than it can cope with, but that later the bark reacts 

 more perfectly to the stimulus of tapping, and pro- 

 duces the raw material faster than the cells can convert 

 it into caoutchouc. In the case of tapping at longer 

 intervals, on the other hand, we may suppose that 

 the stimulus to manufacture rubber leads to an accumu- 

 lation of this material in the latex tubes, which is only 



TABLE XXIV 

 Analyses of rubber from earlier tappings. 



Ash 



Per cent. 

 o-33 

 0-23 

 0*27 

 0-31 

 0-31 

 0-23 

 0-23 



Analyses of rubber from later tappings. 



