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301 



interior of the pots is thus thoroughly smoked. The treatment is 

 over in a few minutes, and is supposed to help to keep the juice 

 from fermentation. Kanjilal l says the smoking gives the pots a 

 glazed surface, and also the alkaline salts of the smoke neutralise 

 acidity, and the heat kills any ferments which may have been 

 produced. 



From our own observation we consider the heating effect must 

 be almost negligible as the pots seldom become more than just 

 warm. 



A number of measurements were made of the actual tempera- 

 ture to which the insides of the pots attain. 



A maximum thermometer was held close to the advancing flame. 

 The highest temperature thus recorded was 53'6 C. 



The following are the temperatures reached by a number of 

 pots during the smoking. The temperature was determined by 

 removing the pot immediately the flame had passed it, inserting 

 the thermometer and closing the mouth with a duster. 



Temp. C. 

 33-0 

 33-0 

 29-0 

 29-5 

 51-5 

 51-5 



It seems, therefore, uncommon for the temperature to reach 

 much higher than 32 C. Numbers 11 and 12 were exceptionally 

 hot pots and one only occasionally meets with pots which have 

 been so strongly heated. 



The following experiments were carried out to find the effect of 

 smoking on preserving the juice. 



In the earlier experiments two pots were attached to the cut 

 surface of the tree. One of the pots was smoked and the other 



Indian Forester, Dec. 1892, p. 454. 



