44 gutta cultivation. 



Enclosure. 



(Mr. Thos. T. P. Bruce Warren, Analytical Chemist to the India 

 Rubber, Gutta Percha & Telegraph Works Compamj, Limited.) 



Dear Sie, — 



SiLVKRTON, E., 



Wi August, 1886. 



Wo havo examined tlie bark of a tree referred to in letter from 

 W. T. Tlnsclton - Dyer, Esq., dated the 11th Juno. 



Our examination has boon principally directed to the followinp; points, 

 viz., whotlier the extraction of gutta percha from the same could bo made 

 remunorativo as a commercial venture, and whether there is any prob- 

 ability of its mooting with a specific application whicli may give it a 

 commercial status. 



As a source of gutta percha many points have to be considered, apart 

 from the ([uality of the gutta percha which may bo obtained from it. 



The moat appropriate method for extracting the gutta percha from it 

 is in treating the crushed bark with a suitable solvent of a volatile nature, 

 so that tho recovery of the soluble matter nuiy bo attended with little 

 chance of alteration in its physical properties. 



The crushed bark thus treated yields 13*6 per cent to bisuljjhide of 

 carbon. On evaporating the solvent a residue is obtained, which hardens 

 on cooling, and softens in warm water ; in fact, in these rospcicts it 

 strongly comports itself to gutta percha; in colour and tenacity it is unliko 

 any description of ordinary good gutta percha. 



It is very improbable whether its recovery by means of .solvents 

 would bo remunerative, as the necessary loss in treating such largo 

 quantities of accompanying useless matter would be very great. 



Th(! want of tenacity in tho product obtained is due to the presenco 

 of a brittle resin, which also contributes to the facility of softening 

 at a low temperature. The difficulty of manipulating the same by any 

 ordinary appliance used in ti'oating gutta percha or India rubber adds to 

 tho difficulty of suggesting a jirobable field in which its projierties would 

 be appreciated. 



I am, etc., 



{Signed) Tuos. T. P. Bruce Warren. 

 Robert Kaye Gray, Esq., 



lOG Cannon Street, E.G. 



{Royal Gardens, Kew, to Colonial Office.) 



Royal Gardens, Kew, 



Qth August, 1886. 

 Sir, — 



I have the honour to inform you that Mr. Leonard Wray, Junior, 

 Curator of the Perak Museum, addressed on the 25th September, 1883, 



