133 
cultivated surroundings suggests that there may be individual 
peculiarities which affect the chemical products of camphor 
Suggested lines of improvement. 
From the statements above it is quite clear that in order to 
produce plantations of trees that will give good quantities of 
solid camphor, (1) seed should be secured from trees known to 
produce camphor. Probably seed of this kind could be obtained 
from Hongkong, as Mr. Green, in his Report on the Botanical & 
Forestry Dept. for 1919, refers to the Chinese distilling camphor 
in various parts of the New Territory. (2) Suitable climate and 
soil should be selected. (See Circular No. 12, published by the 
Division of Botany of the U.S. Department of Agric. in 1897, 
reproduced in the Kew Bulletin, 1899, 57). (3) Saplings must be 
planted so that they may be clipped conveniently. The article 
on camphor cultivation in the United States, in the Agric. Dept. 
Yearbook for 1910 (p. 449-460), part of which is reproduced below, 
gives exact instructions for forming and using camphor planta- 
tions in the climate of Florida, and Circ. 78 (1920) of the same 
Department describes a machine for harvesting the leaves. 
A few notes from Bulletin No. 15 of the Department of Agriculture 
Federated Malay States are added. (4) The best months for 
clipping must be ascertained by experiment as observations show 
considerable changes in the camphor content of the leaves as the 
growing season advances. 
Extracts from ‘‘ Camphor Cultivation,’ by S. C. Hood & 
R. H. True in Yearbook Dept. Agric., U.S.A., 1910, 453-455. 
Propagation. 
““Camphor can be propagated by seed, cuttings, and root 
cuttings, but for commercial purposes the first method is to be 
preferred, except in cases of special varieties having some valuable 
characteristic which would not be reproduced by seed. In 
propagation by seed great care should be taken in the selection 
of the land for the seed bed. If possible, a rich, well drained 
soil which has been under cultivation in previous years should be 
found.” 
The Seed and Seed Bed. 
“Too much emphasis cannot be placed on the preparation of 
the seed bed, since after the seeds are planted no cultivation can 
be given for three months.”’ 
1 See also Chevalier in Revue de Bot. Appliquée, i. 20 (1921). 
