338 



No. 6. Two pieces of thin sheet rubber, dark brown in colour 

 and rather moist. The rubber resembled No. 4 in physical proper- 

 ties. 



The results of the analysis were as follows : — 



Per cent 



Moisture ... ... ... ... 5.6 



Caoutchouc .„ ... ... ... 88.0* 



Resin ... ... ... ... 2.8 



Saccharoid substance ... ... ... I.o 



Proteids ... ... ... ... 2.3 



Ash ... ... ... ... 0.3 



* Including 1.6 per cent, "insoluble caoutchouc." 



It will be seen from these analysis that the percentage of resin 

 in the three samples, when corrected by the determination of the 

 amount of the saccharoid substance which was previously included 

 as " resin," are practically identical, viz., 2.6, 2.7 and 2.8 per cent, and 

 within the usual limits for Para rubber. The amount of moisture 

 present is rather variable, 3.5, 0.9 and 5.6 per cent, and also the per- 

 centages of "insoluble caoutchouc" 48, 5.7 and 1.6 per cent. 



In the absence of full information respecting the origin and pre- 

 paration of these samples it is not possible to discuss the results 

 fully. I shall be glad to know whether Mr. Ridley has furnished you 

 with such information. 



I am, 



Yours faithfully, 

 (Signed) WYNDHAM R. DUNSTAN. 



BROWN'S SPECIFIC 



FOR 



AND 



DIARRHOE^A. 



To be had at the Singapore Dispensary and of Miss Brown, 

 Grassdale, River Valley Road, Singapore :: ;: ;: ;: 



