419 
ANALYSIS of CHINCIIONA bark and leaves, received 
JUNE 21st, 1865. 
From W. G. M‘lvor, Esq., Superintendent of the Government Chinchona Plantations 7 
Ootacamund, to C. G. Master , Esq., Secretary to the Government Revenue Department. 
Ootacamund, 3rd May , 1865. 
Sir,—I have the honour to forward by baughy a box containing a further supply of 
chinchona bark, as per memorandum annexed, for transmission to the Right Honourable 
the Secretary of State for India, in order that it may be submitted to Mr. Howard for 
analysis and report. The bark now forwarded was removed from the plants in the early 
part of April last, or as the sap begins to rise, as at this season the bark separates neely 
from the wood. Specimens Nos. 2 and 3 are renewed barks ; these attain extraordinary 
thickness in a short period of growth ; and if they contain a proportionate quantity of 
alkaloids, this system of treating the plants appears to offer greater advantages than the 
other methods proposed. I may observe that further observation seems to establish that 
this system of removing strips of bark from the stems of the plants can be practised 
without injury, provided the wound is instantly covered with damp moss; inattention 
to covering the wounds having produced the bad effects detailed in my letter of the 17th 
March, 1864. 
Memorandum. 
Chinchona succiruhra. —No. 1. Bark of three years and five months growth, thick” 
ened by the application of moss. No. 2. Renewed bark of one year and hve months 
growth, being reproduced on the same portion of a stem which producer the bark grven to 
Doctor De Vrij in November, 1863, and from which that gentleman obtained 8*409 per 
cent, of alkaloid. No. 3. Renewed bark of one year’s growth, and gathered from por¬ 
tions of the stem which yielded No. 1 bark, submitted to Mr. Howard in the sprang o 
1864. No. 4. Bark of two years and five months’ growth, not thickened by the appli¬ 
cation of moss. 
Chinchona Calisayci. —No. 5. Bark of two years and five months growth. 
Chinchona Condaminea. —No. 6. Bark of one year and seven months glow • 
Chinchona micrantlia. —No. 7. Bark of two years and five mont is grow , ic "ene 
by the application of moss. No. 8. Ditto of same growth, but not thickened by the 
application of moss. __ ,-., T 
™ (Signed) W. G. MTvor, 
Superintendent of the Government Chinchona Plantations. 
Report of an Analysis of the Fourth Remittance of Bark from India. 
From J. E. Howard, Esq., F.L.S., to the Under Secretary of State for India, 
August 1st, 1865. 
Sir_I have the honour to report that I received, and have during the past month.de¬ 
voted’much careful attention to the analysis of eight specimens of bark, referred to in a 
letter from Madras, dated 3rd May, 1865. The whole of the samples were m excellent 
condition, showing the care and skill bestowed on their cultivation. They contrasted 
most favourably with specimens from South America, of bark used at the present mo¬ 
ment in the extraction of quinine. The mode of analysis I have followed, m t le p e 
instance, is that which is employed to ascertain the commercial value which rests almost 
entirely with the crystallizable sulphates, with perhaps some slight loss of the residuary 
product. The results will compare well with those given in Delondre s Qumologie. 
No. 1 gave of crystallized sulphate, per 100 parts.2? 
of alkaloid soluble in ether (sp. gr. -720) • • • • ..V ff, 
of alkaloid insoluble in the above (therefore Chinchonine) . . . . . 1 06 
Mem.—The sulphate refined into white sulphate of qumme m appearance, but this 
did not stand the test used for commercial sulphate of quinine. 
No. 2 gave of crystallized sulphate. 
of alkaloid soluble in ether... 
of alkaloid insoluble in ether. (Chinchonine). 1 80 
Mem.—Refined as above. o.~o 
No. 3 gave of crystallized sulphate. . 
of alkaloids soluble in alcohol . 1 
