215 
CORRESPONDENCE. 
Quinine, Chinchonidine, and Chinchonine, in the Leaves of Chinchona 
suecirubra. 
Tottenham, June 20, 1863. 
the red bark grown in South India, may not be unacceptable. The disco- 
ery of Quinine, Chinchonidine, and Chinchonine, in the leaves of the 
Chinchona, seems to confirm the views which I have expressed as 
production of the alkaloids by a reaction taking place between the mother- 
8 mái À 
tion of quinine, and the semicrystallization thus induced formed on recrystalli- 
zation the crystals which I have described and figured as similar to those found 
in situ in the bark itself. The Chinchona-red appears to be formed at the 
same time, and colours the flocculent mass reddish, or rather pink. I find in 
the leaves abundance of kinovie acid, which, separated from ad 
phyll, becomes perfectly white and similar to that obtained from the bark; 
they also yield much wax and kinate of lime, together with gum. In order to 
check or confirm the trial of the leaves, I also examined with similar results 
if such be at all the process, the alkaloids must be found in the sap itself; and 
if the quinine be formed in the leaves, in which there are certai i 
fibres, it seems to me to dispose of the hypothesis that these latter are in some 
way essential to the formation of the alkaloids. 
incides with the presence of quinine (as I have shown) very eminently in the 
cellular tissue of the outer bark, which is evidently, in the barks under consi- 
deration, gorged to repletion with sap. Reserving any re i 
arks for some further oceasion, I re- 
Jons Error HOWARD. 
. 
scopie peculiarities in these East Indian b 
main, yours, etc., 
uc Ls eet 
Bryological Notes. 
Rose Hill, Bowdon, Cheshire, June 24, 1863. 
I have discovered a second British locality for Sphagnum laricinum, Spruce, 
described by Wilson as S. contortwm, var. laricinum, Yn general aspect this 
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