279 



Rubber. 



Resin. 



Loss. 



96.6 



3-4 



17 



95.2 



4.8 



17 



97.5 



2.5 



say 3 



Yours faithfully. 





For comparison's sake ([uite a large number of chemical tests give. 



Fine Para 

 Medium Para 

 Ceylon 



Robert KaV Gay, 



Managing Director. 



Harburg and Vienna India Rubber Works. 



H(U'biir>i-on-Elbc, June 19th. igog. 



Hknry N. Ridley, Esq., 



Director. Botanic Garden Singapore. 



Straits Settlements. 



Dear Sir, — As promised you by our Mr. Hoff, in his letter to you 

 of 25th ult., we have the pleasure to give you the following report on 

 the examination and tests made with the two samples of Eastern Para 

 rubber cured by the Brazilian method of smoking. 



We received the following samples: — 



Sd tuple 1. The rubber is of very good elastic, and tough qualit\', 

 dark yellow in colour, with a smell like hard cured Para. 



Loss by washing ... ... ... 21, 8 'o 



Extracted with alcohol ... ... ... 4, 4% 



„ „ alcoholized potash ... 2, I % 



Ash ... ... ... 0, 6% 



Melting point ... ... ... ... 155' C. 



Sample 2. —The rubber is of good elastic and tough quality some- 

 what yellower in colour than No. l, however, not so good as the same, 

 with smell the same. 



Lossiby washing .. .. ... 13, 0% 



Extracted with alcohol ... ... ... 4, I % 



alcoholized potash ... 2, I 7- 



Ash ... ... ... ... ... 0, 42 :- 



Melting point ... ... ... ... 155 C. 



Kor comparison in the examination. Fine hard cured Para. Ceylon 

 ('repe of light colour, Ceylon Crepe of darker colour, and Prime Con- 

 go were used. We beg to remark, however, that the name of the 

 Estate and the age of the trees, from which the Ceylon sorts were 

 obtained were unknown to us, and we are of opinion that the materials 

 at hand for comparison do not represent really first class Ceylon Para. 

 It would be desirable to obtain from the Botanic Gardens, Para, which 

 through careful coagulation by chemical means of the latex gathered 

 from trees of corresponding age, and by careful washing, would give 

 an authentic table for comparison. 



