PARA RUBBER. 



125 



subsequent research has not confirmed this contention as far as 

 Para rubber is concerned. 



Mr. M. Kelway Bamber has made a series of analyses of Para 

 rubber from trees of different ages, and the proportion of resin 

 is here shown : — 



Para Rubber from Trees of Different Ages. 



Resin 



Resin 



Two years. 

 A. B. 



3-25% 3-60% 



Eight years. 



Four years. 

 A. B. 



Six Seven 



years. years. 

 3-28% 2-72% .. 2-75%.. 2-10% 

 Ten-Twelve years. Thirty years. 

 2-26% .. 2-32% 



Para and Other Rubbers. 



It has been suggested that the addition of analyses of other 

 rubbers might be of value, and accordingly the following tables 

 have been draw up :- 



(1) M. Kelway Bamber, Committee of Agricultural Experiments, 

 November. 1905. 



(2) Bulletin of the Imperial Institute, June, 1904. 



(3) Do. do. do. June, 1904 (rubber from Xatal) 



(4) Do. do. do, Jan., 1905 (rubber from East Africa). 



