352 
Second period of three hours. Camphor and oil -0-2 
per cent. m 
Third period of three hours. Camphor and oil = Iraee. 
L, Conclusions : — These experiments indicate that it 
would probably not be advisable to carry on the distillation 
for a longer period than three hours in the ease of camphor 
primings. 
Comparison with Previous Investigations. 
The results compare favourably with the investigations 
of Messrs. Willisf and B amber on the cultivation and pre- 
paration of camphor in Ceylon (Vide Circular Series I, No. 
4 Roval Botanic Gardens, Ceylon 1901). Hooper. (Vide 
Pharmaceutical Journal (56) Vol. ii P. 21) also obtained a 
vield of* 1 per cent of oil from leaves of plants grown m 
India. In one instance the oil is stated to contain only 
10-15 per cent of camphor, while another specimen yielded 
75 per emit of camphor, , n 
Kchimmel <£: Co. in Germany, one of the largest manu- 
facturers of essential oils, also obtained an oil from the 
roots, which, was stated to consist chiefly of camphor. The 
amount of camphor isolated from tile. oil will depend on 
temperature etc., more camphor can be separated from the 
oil by cooling, and also by redistilling the oil alone, prefer- 
able under reduced pressure, or with steam. 
' The camphor is a much more valuable commercial ar- 
ticle than the oil, but the oil is also used to a considerable 
extent now for the preparation of safrol, as well as tor 
solvent purposes', in cheap perfumery, soaps, etc. 
Future Experiments. 
The experiments already initiated will be carried on as 
time permits with further material and with younger trees. 
The trees in the Experimental Plantation, Kuala Lumpur 
are onlv two years old, and experiments will be made with 
these at intervals, to ascertain the yields at different stages 
of the plant’s growth. Experiments are also being made 
to find the most suitable planting distances, and in addition, 
the most suitable form of cultivation, methods of pi umng 
and their effects are being investigated. 
Analyses of the soils on winch these trees are being 
cultivated will also be made, and the mammal value of the 
primings estimated before and after extraction. 
