638 



Dec. 1887, p. 16). 



"preadin 



the latex on leaves of a species of Calathea ; putting two prepared 



emftvm 



leaves. The latex may also be diluted with hot water, and 



cream 



may be removed and treated Hke that of Hevea to form '' sheets "" 

 or '"crepe," The use of a centrifugal machine, ordinary evapo- 



be resorted to. 



alum may 



1 * 



The yield of trees cultivated under good conditions is esti- 

 mated at 1 lb. of rubber per annum for trees 9-10 years old 



but some variation may be looked 

 3 a^e and certain climatic conditions^ 



(Kew Bull. 1899, p. 161); 



om 



somewhat 



Bef 



AlHed 



Rubber Yielding Plants, in Trans, Linn. Soc. ii. 1886, pp. 209 



215. " Castilloa Rubber of Central America {Castilloa elastica) 



in Kew Bull. Dec. 1887, pp. 13 16 ; 1899, pp. 159-164. 



*' Peruvian Rubber," I.e. 1899, pp. 6^-72; reprinted in Add. 



Series, vii. " Rubber," pp. 170-184. " The Mexi 



Dering, in Dip. & Cons. Rep. Misc 



(( 



J? 



Warbur^ 



o 



Panama Rubber {Castilloa)'' Royal Bot. Gardens, Ceylon, Circ. 



No. 11, 1899, pp. 95-104. " Castilloa" in Expedition, Central 



& Sud-Amerika, Preuss, pp. 369-384 (Berlin, 1901J. " Le 



Castilloa 



Challamel, Paris 1902).—" Castilloa,'' in Les Plantes a 

 ihouc et a Gutta, Jumelle, pp. 185-225 (Aug. Challamel, 



Paris, 1903). The Culture of the Central American Rubber 



Tree, Cook, U.S. Dept. Agric, Bureau PI. Industry, Bull. No. 49, 

 1903, pp. 1-86, plates i.-xviii ; reprint in The India Rubber 

 Journ. Nov. Dec. 1903 and Jan. 1904; Review in Bull. Imp. 

 Inst. ii. 1904, pp. 32-39.^ — —-*' Central American Rubber," Jones> 

 in West Indian Bull. vii. No. 1, 1906, pp. 16-20.— Z6i(?., Moore» 

 I.e. pp. 21-29. " Castilloa Rubber in Dominica," Jones, I.e. 



xiii. No. 3. 1913, pp. 253-258 



Amer 



Rubber," Fawcett, in Tropical Life, Sept. 1908, pp. 137-138. 

 " A Preliminary Treatment 



m 



Herb. xiii. part 7, 1910, pp. 247-279. 



al America," Smith. 

 X. Jan.-March 1911, pp. 81-93. 



" Castilloa elastica ," in The Whole Art 



Wicherley, pp. 92-99 (West Strand PubUshing Co. Ltd. 1911). 



" Castilloa in Cuban Valleys," in The India Rubber World, xlvi 



April 1st, 1912, pp. 315-322. " Castilloa Rubber," in Col. 



Rep. Misc. No. 82, 1912, pp. 299-312 ; India-Nilgiris, Trinidad & 



Tobago, Dominica, St. Lucia, Venezuela and Zanzibar. 



" Castilloa elastica Seeds," in Col. Rep. Misc. No. 88, 1914,. 

 pp. 499-500, from Trinidad, with analysis. — — " The Centra] 

 America Rubber Tree : Castilloa elastica," in Rubber : It& 



