92 PARA RUBBER. 



same tree. Adriani, who investigated the latex of the same 

 species, discovered that the percentage of solid matter was less 

 in the latex obtained from the higher and younger parts of the 

 tree than in that obtained from the parts nearer the ground. He 

 also found that the caoutchouc globules in the latex obtained 

 from the young growths were smaller than those in the latex 

 yielded by older parts. Burgess found the percentage of rubber 

 in latex collected from the first 2 feet of the trunk of the Para 

 tree nearest the ground, and that of latex obtained at a height 

 of 20 feet from the ground, to be 44.4 and 39.8 respectively, 

 while latex from a large exposed root contained 43.8 per cent, 

 of rubber. 



Generally speaking, the rubber obtained from the higher 

 parts of the Para tree is inferior in quality to that obtained from 

 the trunk nearer the ground ; incisions made in the last men- 

 tioned region are certainly most productive of rubber. 



Fig. 15 shows Caillet's Monorail system manufactured by 

 Messrs Francis Shaw & Co., in operation on the Lanadron 

 Estate, Muar, Johore. This system greatly facilitates the trans- 

 port of latex, manures, rubbish, &c., on rubber plantations. 



