348 
(6) 6th distillation. 500 grams of leaves (mouldy) 
gave 6-26 grams of camphor and oil = 1*25 per cent. 
(7) 7th distillation. 500 grams of leaves previously 
dried in the sun for two or three days, gave 6*27 grams, 
(weight of dried leaves - 300 grams) camphor and oil - l*2o 
per cent. Calculated on air dried leaves - 2*09 per cent. 
(8) 8th distillation. 500 grains of leaves (mouldy) 
gave 7*35 grams camphor and oil = 1*47 per cent. 
(9) 9th distillation. 750 grams of leaves and twigs 
previously air dried. (Final weight = *468 grams) gave 
8*27 grams of camphor and oil = 1*10 per cent. Calculated 
on air dried material = 1*77 per cent. , 
(10) 10th distillation. 500 grams of leaves air dried, 
(Final weight = *240 grains) gave 5*83 grains camphor and 
oil ~ 1*16 per cent. Calculated on air dried material --j 4 
,,e (ii) nth distillation. 500 grains of mouldy leaves, 
air dried, (Final weight = *270 grams) gave 7*71 grams 
camphor and oil = 1*54 per cent. Calculated on air dried 
material = 2*8 per cent. 
(12) 12th distillation. 500 grams of whole leaves an* 
dried, (Final weight = *285 grams) gave 7*53 grams camphor 
and oil = 1*50 per cent. Calculated on air dried material - 
2*6 per cent. (i , ... 
( 13 ) 13th disti 1 1 ation. 500 grams o t 1 eaves and twi gs 
etc., gave 7*92 grams of camphor and oil = 1*58 per cent. 
Conclusions These experiments show (1) that a 
much larger percentage of camphor and oil is obtained from 
the leaves than from the young wood or twigs. 
(2) That air drying lias no detriminal etlect on the 
yield : if air drying be resorted to however, it should not 
be carried out in direct sunlight. 
(3) That the principal product is camphor with a 
small percentage of oil. j . , 
(4) That a yield of at least 1 per cent ot camphor 
with a small percentage of oil may be expected from the 
primings of trees of this age viz: 5 years, and probably trorn 
trees younger than this. 
Further Experiments on a Larger be ale. 
As the above preliminary experiments appeared to be 
so satisfactory it was decided to erect a large still on a more 
practical scale. . , t . ^ , , , 
A plant was constructed on our design hv the h eder&ted 
Engineering Company, Kuala Lumpur, and although satis- 
factory, experience has shewn that it can be improved in 
many ways. 
