244 
ANALYSIS OF BARK FROM INDIA. 
containing a little chinchonidine. The same remark applies to a portion (the second 
crystallization) of oxalate quinine. 
I adopted for No. 3 the plan of securing the total weight of alkaloid in the first in¬ 
stance, as I was uncertain of any further result, having only 300 grains of bark to work 
upon, and that of poor quality. This plan is, however, deceptive, the alkaloids not 
being purified. The loss is also more than is apparent, since the amount of the oxalic 
acid must be added for minute accuracy. 
The deductions from the foregoing analysis seem to me to be the following :— 
The mossed crespilla bark is surprisingly improved by the treatment to which it has 
been subjected. I think that, in the former trial, some portion of the alkaloid must 
have been unconsciously lost in connection with the abundant colouring matter which 
distinguishes this sort, but with all this improvement, it scarcely equals No. 2, the 
strong-growing variety, or 0. officinalis , var. Bonplandiana , in its natural state. This 
latter gave me, as last sent, more than 6‘50 per cent, of crystallized sulphate, and is, 
consequently, by so much (about three times) more worth cultivating. The No. 3, 
Uritusinga bark, is remarkable for the small amount of colouring matter which it con¬ 
tains, and the consequent ease with which the alkaloids can be purified. It will pro¬ 
bably yield a large amount of produce under good cultivation. No. 4, C. Pahudiana, 
is improved by mossing, but I have no confidence in it as a source of quinine, and 
believe it will prove to be most valuable as furnishing a new sort of “ rusty bark,” or 
“ rusty crown bark,” as it would probably be called in commerce, and, as I mentioned 
in my last, would command a good price in this way, if imported in long and slender 
quills. 
Since the last report, I have received from Mr. M‘Ivor well-prepared specimens of the 
flowering branches, the fruit, etc., of the different sorts. Amongst these, the O. offici¬ 
nalis , var. Bonplandiana , and the Uritusinga , reproduce exactly those grown in South 
America, but it is not so with the crispa , which seems to be represented by several more 
or less distinct varieties. These are all elegant, and apparently delicately-formed sorts; 
and one, having (according to MTvor) the habit of the weeping willow, might be called 
the var. dependens. It remains to be seen what their special commercial value may 
be. The crispa (as gathered by Seemann) is distinguished by very hirsute scrobicules, 
and these are reproduced (but irregularly) in a number of plants of this sort which I 
have raised from seed received from Mr. Thwaites, but I cannot find them in the spe¬ 
cimens from Ootacamund. I miss them also in some very healthy plants which now 
(in October) are growing in the open air in my garden. Possibly climate may influence 
their production. 
ANALYSIS OF DARJEELING CHINCHONA BARK. 
BY T. ANDERSON, ESQ., M.D. 
To the Secretary to the Government of Bengal. 
April §th, 1867. 
Sir,—I have the honour, to forward a box containing specimens of chinchona bark 
taken from trees growing in the plantations at Darjeeling, and I have to request that 
these specimens may be sent through the Right Honourable the Secretary of State to 
Mr. Howard for chemical analysis. 
The two trees of C. succirubra which yielded the specimens of red bark were planted, 
one on the 29th July and the other on the 15th October, 1864, when they were about 
10 inches in height. They were .cut down on the 13th February, 1867, thirty-one 
and twenty-eight months respectively after planting. The plants grew in the fifth 
plantation, 2556 feet above the sea. 
The bark of C. officinalis was taken from two plants of the narrow-leaved variety of 
this species, which were planted on the 15th October, 1864, in the fourth plantation, 
3332 feet above the sea. They were also cut down twenty-eight months after they were 
planted. 
None of the plants whose bark is now sent have been destroyed, as, although their 
stems were sawn across close to the ground, the crown of the root and the roots them¬ 
selves have been left undisturbed, in hopes that shoots will be sent up from the “ stool.” 
