347 



Steam was generated in a separate boiler and passed 

 through the leaves or twigs in the still. 



Preparation of Material. 



Experiments were made with material prepared in the 

 following manner (1) the unbroken leaves (2) leaves cut 

 up into small pieces (3) air dried leaves (4) mouldy leaves 

 (5) twigs cut up into small pieces about an inch long. The 

 leaves and twigs used in these experiments were cut by 

 coolies using parangs (knives) only. 



On a commercial scale some kind of chafT cutting or 

 other similar machine could be used for the purpose, to save 

 labour, either worked by hand, by bullocks, or machine 

 driven as circumstances necessitate. 



Preliminary Experiments. 



11.5 kilograms = 26 lbs. of prunings consisting of 64.9 

 per cent leaves and 35.1 per cent twigs were received for 

 experiment from the Superintendent of Experimental 

 Plantations (Mr. J. W. Campbell) being the part prunings 

 from a live year old tree at the Experimental Garden, Batu 

 Tiga, Selangor. 



As only the small apparatus (described above) was at 

 the time available for the experiment, the distillation had 

 to be extended over a number of days and the results of 

 each distillation were kept separate for comparison and 

 carried on under different conditions as described above, 

 entirely for experimental purposes, in order to ascertain 

 if these conditions gave different results. 



The following results were obtained: — 



(1 ) 1 st distillation. 400 grams of cut leaves gave 4*89 

 grams of camphor and camphor oil =• 1*22 per cent. 



This consisted of camphor 1*16 per cent and oil 0*06 

 per cent. 



(2) 2nd distillation. 500 grams of leaves more finely 

 cut than in (1) gave 5*86 grams of camphor and oil = 1*17 

 per cent. 



This also consisted mainly of pure camphor. 



(3) 3rd distillation. 1500 grams of twigs gave 6*75 

 grams of camphor and oil = 0*45 per cent. 



This also consited chiefly of camphor. 



(4) 4th distillation. 500 grams of leaves and twigs 

 gave 6*25 grams of camphor and oil = 1*25 per cent. 



(5) 5th distillation. 1000 grams of twigs gave 0*6 

 grains of camphor and oil = 0*60 per cent. 



