18 ANALYSIS OF CHINCHONA BARK AND LEAVES, 
Memorandum. 
Chinchona succirubra.—No. 1. Bark of three years and five months’ 
growth, thickened by the application of moss. No. 2. Renewed bark 
of one year and five months’ growth, being reproduced on the same 
portion of a stem which produced the bark given 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 portions of the stem which yielded No, 1 bark, sub- 
mitted to Mr. Howard in the spring of 1864. No. 4. Bark of two 
years and five months’ growth, not thickened by the application of 
moss. 
Chinchona Calisaya.—No. 5. Bark of two years and five months’ 
Chinchona Condaminea.—No. 6. Bark of one year and seven months’ 
Chinchona micrantha.—No. 1. Bark of two years and five months’ 
growth, thickened by the application of moss, No. 8. Ditto of same 
growth, but not thickened by the application of moss. 
(Signed) W. G. M'Ivon, 
Superintendent of the Government Chinchona Plantations, 
Report of an Analysis of the Fourth Remittance of Bark from India. 
From J. E. Howard, Esq., F.LS.,to the Under Secretary of State for India, 
: : August 1st, 1865. 
, and have during 
to the analysis of eight 
The mode of analysis 
which is employed to 
rtain the commercial value, which rests almost entirely with the 
erystallizable sulphates, with perhaps some slight loss of the residuary 
product. The results will compare well with those given in Delondre’s 
“ Quinologie.” 
