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suggested, it is idbscBe by Mr. Tempany to be the time of the 
year at which the leaves were clipped for distillation. If there 
is any other circumstance affecting the healthiness and cell 
activity of Cinnamomum Camphora it will on the above theory 
affect the yield of Camphor. This supposition gains support from 
Mr. L. A. Boodle’s microscopic examination of the specimens of 
wood from the experimental plantations in Mauritius above 
referred to :— 
“ On re-examining ‘No. 6 (from a tree said to yield camphor), 
fungal filaments were found in certain parts of the wood,’ he 
writes, “ but were decidedly less abundant than in specimens 3, 
4, and 7 (from “ oil trees’’). It is doubtful to what extent the 
growth of the fungus in the wood may have taken place after 
the trees were felled or the specimens were cut, but the distri- 
bution of the fungus in the latter rather suggests that the living 
trees were attacked to some extent. It is suggested as a-mere 
possibility that, in these particular specimens, fungal attack of 
the wood may have had a deterring effect on the production of 
camphor, since the sample from a camphor-producing tree 
(No. 6) shows markedly less fungus than the other three 
specimens, which are samples of oil-producing trees (3, 4, and 7). 
Whether fungal disease of the wood is common in Mauritius, 
and whether it influences camphor production, cannot be satis- 
factorily dealt with except on the spot.” 
“In 3, 4, and 7, the secretion in the oil-cells in the wood is 
mostly yellow, while in 6, the oil-cells either appear empty, or, 
where a secretion is visible, it is nearly always colourless. This 
observation quite agrees with No. 6 being a camphor-producing 
sample, since loss of yellow colour in the secretory cells accom- 
panies the transformation of the oil into camphor (Tschirch, 
Die Harze u.d. Harzbehalter, 1906, vol. 2, p. 1175). On comparing 
sections from different parts of specimens 3, 4, and 7, it appeared 
that the presence of yellow secretion in the oil cells was general 
in regions strongly attacked by a fungus, but that the yellow 
colour was mostly. absent, or rarer, in the sounder portions of 
the wood 
It is noticed also in this connection that the climatic conditions 
N. Formosa seem to favour a plentiful production of solid 
camphor, whereas in the south, according to a letter from 
Mr. Takeda written in 1919, many trees yield little solid camphor 
but large quantities of Sho oil and Yu-ju oil, the trees being 
known to the Japanese as Sho-gyu and Yu-ju respectively. In 
the climate of Florida the same species produces solid camphor 
mixed with an oil differing from the Japanese oils in its low per- 
centage of safrol. (Hood & True in Yearb. Dept. Agric. U.S.A., 
1910, 459). Hood and True have shown the remarkable variation 
of camphor content in the leaves of trees growing under different 
conditions of shade and soil, and M. K. Bamber in his experi- 
ments in Ceylon has found evidence of the same fastidiousness. 
Mr. Caraieity: (formerly Director of Agriculture in oo in the 
