588 



Fitntumia elastica {see p. 457) more perhaps depending on the? 

 skill and care of the workmen, who as a rule prefer as simple 

 a knife as possible. 



In the collection of the latex, coco-nut, tin, iron, steel,^ 

 aluminium, enamelled iron, glass and earthenware cups have- 

 been used, the first obsolete and the four latter most in favour^ 

 with a preference perhaps for glass and smooth earthenware. 

 It is essential to have cups that can be easily cleaned- Tor the 

 same reason the pails for carrying the latex to the factory should 

 be of some suitable manufacture, the kerosene tin often used 

 on account of its cheapness has given way to the round galvanised 

 milk pail now commonly used. 



Coagulation may be effected by various acids (see p. 457) 



most common 



some attempt 



with specially designed machinery on the native BraziHan 

 method, of submitting it to the smoke of burning nuts. On 

 coagulation it is prepared as speedily as possible in the forms 

 referred to above, " biscuits " and '' crepe " being the most m 

 favour, the former by hand and the latter by machinery. It is 

 important that in whatever form shipment is made the rubber 

 should be throughly dry. Smoke-drjing instead of air-drjing is^ 

 sometimes resorted to, the fuel being mangrove wood, coco-nut: 

 husks, or other convenient material. The seeds yield approxi- 

 mately 40 per cent, of oil suggested as a substitute for Linseed. 

 Oil and for use in the manufacture of paints and of soft soap 

 {see Col. Rep. Msc. No. 88, 1914, pp. 450-457). 



The above details are necessarily very brief, the subject 

 being, like cotton, indigo, &c., one for the expert and in view 

 of the extensive literature including many excellent text-books, 

 readily accessible, little more than references need be given^ of 

 which the following is confined to books and special bulletins. 



M 



Kew 



'* Para Rubber {Hevea hrasiliensis)'' I.e. 1898, pp. 241-277. 

 -"Para Rubber in the Straits Settlements," I.e. 1899^ 



pp. 21, 22, " Export of Para Rubber Seeds/' Lc. 190t?, pp. 



196-197. " The Rise and Fall of Prices of the Forest Product 



for 30 years and Cultivated for 4 years," I.e. 1906, pp. 241-242 r 



reprinted in Add. Series vii. 1906, pp. 75-117. "The Culti- 



vation and Preparation of Para Rubber,'* Johnson, pp. 1-178 



(Crosby Lockwood & Son, London, 1904, 2nd ed. 1909). 



Hevea hrasiliensis or Para Rubber : Its Botany Chemistry and 

 Diseases, Wright, pp. 1-530 (A. M. & J. Ferguson, Colomba, 

 1906, 4th ed. Maclaren & Sons Ltd. London, 1912). Rubber 



in the East : Official Account of th^ 



Ceyl 



Peradeniya, Sept. 1906, Willis, Bamber & Denham, pp. 1-265 

 (Govt. Printer, Colombo, 1906). On the Plantation, Cultiva- 

 tion and Curing of Para Indian Eubber, Wickham, pp. I-7S 



illustrated (Trubner & Co. Ltd. London, 1908). Para Rubber 



in the Malay Peninsula, Asimont, pp. 1-64 (L. Upcott Gili 



