41 CHINCHONA FROM THE NEILGHERRY HILLS. 
to be somewhat analogous to indigo, and its ethereal solution has a 
peculiar effect on the rays of light, the reflected ray having almost a 
blood-red colour, whilst the transmitted ray is a fine green.* 
^^ T will now notice the remaining specimens. Nos. 1 and 2, though 
presenting a promising S apres were in too small quantity to jus- 
examination. No. 3, “Red Bark from branches of eighteen 
months and under," yielded me not less than 6 per cent. of rough 
alkaloid; but of this a larger proportion seemed to be Quinidine and 
Chinchonidine, but as I had little more than an ounce of bark to exa- 
mine, I cannot consider this comparative result as an ascertained fact. 
As these barks were cut at the period when the sap is in full flow, it is 
not at all improbable that the alkaloids may vary somewhat from those 
produced at a different season. The above 6 per cent. of alkaloid 
yielded in a state of further purification 4-10 per cent. of Quinidine, 
Chinchonidine, and Quinine, and also a portion, 0°9 per cent., insolu- 
in ether, in all 5 per cent. The portion insoluble in ether, and 
not capable of being crystallized from spirit, I set down as Chinchoni- 
cine, and not pure Chinchonine, of which last I find but few indications 
in these young barks. The Quinidine crystallizes as hydriodate, and the 
Chinchonidine as a resinous mass, when united with eee acid. 
Both form a feathery crystallization as sulphates, 
No. 5, ** Red Bark from small branches broken by the shut ” gave 
a result very nearly resembling the analysis of the leaves. This is not 
surprising, considering the very immature: state of these succulent 
branches. I obtained 1 per cent. of alkaloid soluble in ether, which 
gave a doubtful trace of erystallization’ as sulphate. A further por- 
tion of impure alkaloid insoluble in ether resembled the same substance 
as described under No. 3 
«Phe No; 8, **€: — bark, from small branehes broken by the 
wind," gave, on examination, more chincho-tannic acid than No. 5. 
The precipitated alkaloids appeared to be, as above, 1 per cent., but of 
this 0°40 per cent. proved to be oxidized tannin, and iisa in 
ether ; the rest in part crystallized from ether, and in’ part formed a 
Quinine-like mass; the crystalline portion formed erystals as hydrio- 
date, indicating the Quinidine of Pasteur: the total proved to be 
Quinidine (Quinine P), and a trace of Chinchonine 0:60 per cent. 
* Further investigation has enabled me to separate this peculi 
into two entirely different substances.—J. E. H, ; Ton 9 gr solution 
* 
