REPORT ON THE CHINCHONA SUCCIRUBRA. 211 
Hinds!, Barclay! United St. Expl. Bxped.!), Marquesas Islands 
(Mathews ! n. 93, Barclay /) ; Viti (Seemann ! n. 341). 
REPORT TO THE UNDER SECRETARY OF STATE FOR 
INDIA.ON THE BARK AND LEAVES OF CHINCHONA 
SUCCIRUBRA GROWN IN INDIA. 
By J. E. Howarp, Esq. F.L.S. 
Communicated by CLEMENTS R. MARKHAM, Esq., F.S.A., F.R.Q.S. 
[The propagation of the different species of Chinchona, introduced into India 
by Mr. Markham, has been so eminently successful in the Neilgherries, under 
the able superintendence of Mr. M‘Ivor, that thousands of young plants can 
now be supplied to the public. By order of the Government of Madras, r. 
excellent official report on the first bark gathered on Mr. M‘Ivo à 
will effectually dispel the fear that the Chinchonas grown artificially in India 
might not contain the same alkaloids as those produced spontaneously in South 
America, whilst the discovery of quinine, ete., in the leaves of the red bark has an 
importance which physiologists will know how to appreciate.—E». 
I have the pleasure of reporting that the specimens of Chinchona 
bark and wood, together with dried leaves, and decoction made from 
_ the same, which were forwarded from the Neilgherry Hills, in Southern 
India, by Mr. M‘Ivor, reached me in good order on the 23rd of May 
last, and that I have since submitted them to careful examination. 
dried under favourable circumstances. Tt is full of sap, which, in some 
cases, exudes a little at tbe cut ends, and forms what is called a resinous 
ring or circle. The specific gravity is considerable, and the thickness, 
especially of the fifteen months old bark, is remarkable for the time o 
growth, being about one-tenth of an inch in some of the quills, which 
curl much in upon themselves in drying. The external ro is 
P 
