ANALYSIS OF CHINCHONA BARK AND LEAVES, 19 
No. 1 gave of crystallized sulphate, per 100 parts . . . . . . . . 600 
of alkaloid soluble in ether (sp. gr. 720) . 0°94 
of alkaloid insoluble in the above ene Chinchonine) . end 
Mem.—The Popa refined into white sulphate of quinin 
— did not stand the test used for paeen a sulphate p 
No. 2 gave of aoid supina . 2027. 0. 064 ee ee N 
of alkaloid soluble in ether «cA E A E E RENE 
of TETEA insoluble in dhar hoaa zou. E yt 
Mem.—Refined as above. 
No. 3 gave of cepvisiitiod d ulphate kh ive os du Wc Mr d * ps 
of alkaloids soluble in bela. 
Mem.—As I could only submit to eutination 165 gii of the [59 fe 
above result must be taken with reserve. 
No. 4 gave s crystallized s ue Rc : (due Dou uud c ye | 
f alkaloid soluble in e ch ee Uc NE 
"t alkaloid insoluble in ue Se (Chincho onin o ss. OGO 
Mem.—This specimen gave a product no adipi =e 80 ole as No. 1. 
No. 5 gave of crystallized sulphate . jn Ore 
of alkaloid soluble in ether . ies DIO 
of alkaloid soluble in cue but erystallized - evaporation . 026 
of alkaloid insoluble in ether. (Chinchonine) a trace. 
Mem.—This sulphate did not stand ibo eth er test. 
No. 6 gave of crystallized sulphate . eg ep ade «e ee ee ee 900 
of alkaloid soluble in ether Re x4. nO 
of alkaloid insoluble in gum ( Chin ch ERE cree c. BROS: 
m,—The tests showed Quinine and Chinchonidine. 
No. ; gave of crystallized su sulpha te igor a? e o ow SU. DUE 
of alkaloid soluble in shes. ain ine) Dd i ee N dm 
of alkaloid insoluble in ether. tiic honin 
Mem.—This ee is that of commercial Quinidine, sai nha mS. 
o Quinine. 
No. 8 gave of gib ane BO . .. . V. s V SIUS PE 
kaloid Lei in ether s.v 7. 9 maB 
of alkaloid insoluble in dili. (Qhinchonin) sob. c. 5 eee. 
Mem.—The produet similar to that of N 
I beg to direct special attention to the remark, that the fine white 
crystallized Sulphate of Quinine (apparently) made from the bark of 
C. succirubra will not stand the test which is employed to distinguish 
the ee article in commerce. The cause of this I stated in my first 
report, viz. that “the erystallizations obtained are mixed with some 
rS of Chinchonidine, which is commercially (but not medina} 
a disadvantage, and one which always attends the products of red bark.’ 
It is, of course, possible to separate the Chinchonidine, but then this 
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