28l 



sample has been perhaps slightly overheated in the process of 

 smoking. 



The unapproachable light colour, which is so much valued by 

 many manufacturers, and which differs from all other sorts would be 

 affected by the process of smoking. 



We beg to remark that we will refer again to the tests for break- 

 ing strain, stretch, and viscosity, as we will repeat these tests after 

 the materials made have been kept for some time. 



Should you desire to have further tests made for an exact com- 

 parison, please send us further samples, say about lo lbs. each, 

 gathered from trees the same age and under the same conditions, 

 smoked, and unsmoked, and we shall be very pleased to make the 

 tests and give you a report on same. 



We are. 



Yours truly, 



Vereinigte Gummiwaaren-Fabriken Harburg-Wien 



VORMALS MENIER-J. N. ReITHOTTER. 



LE NOZ. 



W. KULLUNAY. 



Continental Scientific Laboratory. 



(Trafis}atio7i.) 



Dear Sir, — The sample of smoke cured Rubber of Mr. Ridley, 

 the receipt of which I acknowledged already has been tested here and 

 you will find the results under. I beg to state that the examination 

 has been made by Dr. Weill of the "Continentals" scientific labora- 

 tory. The Rubber looked quite the same as Brazilian Rubber, even 

 the smell was alike. The colour was almost black externally, like the 

 Brazilian, the cut was white. 



On cutting the sample quite a quantity of water ran out and it 

 appeared that the different films of the Caoutchouc were much thicker 

 than is the case with the Brazilian Rubber. Further several spots 

 showed considerable quantities of a somewhat spongy, yellow-white 

 matter, which is also found in the Brazilian "Extrafine." This is the 

 consequence of insufficient careful smoking. With a longer experience 

 this can be easily avoided. I am inclined to believe that too much 

 latex has been put on at a time. 



The quality of the Rubber is an excellent one, the loss in washing 

 and drying was l8, 9 %, the dry rubber contained 5 % of resin. As to 

 the percentage of 1 8, 9 % water, fresh imports of SOFT FINE PARA 

 show the same loss, whereas HARD FINE, from the upper Amazon- 

 as, should not have more than 17 % on account of the longer transport. 

 However, it is sometimes more than 17 %. 



