oz.       L
1848   3,856    5,898
1849   1,114    1,560
1850   8,976   12,566
1851   7,605   10,647

The following is the arrangement of these barks adopted by Pereira, who has gone very fully into the subject:—­

A. True cinchonas, with a brown epidermis.

    I. Pale barks 1.  Crown or Loxa bark. C.  Condaminea. 2.  Gray or
    silver or Huanuco bark. C. micrantha. 3.  Ash or Jaen bark. C.
    ovata. 4.  Rusty or Huamalies bark. C. pubescens.

    II.  Yellow barks. 5.  Royal, yellow or Calisaya bark. C. sp ?

    III.  Red barks. 6.  Red bark. C. sp ?

    B. True cinchonas, with a white epidermis.

    I. Pale barks. 7.  White Loxa bark.

    II.  Yellow barks. 8.  Hard Carthagena bark. C. cordifolia. 9. 
    Fibrous ditto.  Perhaps C. cordifolia. 10.  Cuzco bark. C. sp.?
    11.  Orange bark of Santa Fe. C. lancifolia.

    III.  Red barks. 12.  Bed bark of Santa Fe. C. oblongifolia.

The genus Exostemma yields various kinds of false cinchona bark, which do not contain the cinchona alkalies.  The following are some of the kinds noticed by Pereira:—­

1.  St. Lucia or Piton bark. Exostemma floribundum. 2.  Jamaica bark. E. caribaeum. 3.  Pitaya bark. E. sp? 4.  False Peruvian bark. E. peruvianum. 5.  Brazilian bark. E. souzianum.

The mode adopted by the bark-peelers of obtaining cinchona varies somewhat in different districts.  The Indians (says Mr. Stevenson, “Twenty Years’ Residence in South America”) discover from the eminences where a cluster of trees grow in the woods, for they are easily discernable by the rose-colored tinge of their leaves, which appear at a distance like bunches of flowers amid the deep-green foliage of other trees.  They then hunt for the spot, and having found it out, cut down all the trees, and take the bark from the branches, and after they have stripped off the bark, they carry it in bundles out of the wood, for the purpose of drying it.  The peelers commence their operation about May, when the dry season sets in.  Some writers state that the trees are barked without felling.

In a letter published in one of the Calcutta papers not long ago, from the pen, I believe, of Mr. Piddington, he strongly urged the introduction of the cinchona tree into British India:—­

There is (he observes) one tree, the introduction and the copious distribution of which within certain appropriate points of the sub-Himalayan range, “would confer a greater blessing on the great body of natives, than any effort the Government has made or can make, and that is the cinchona bark tree.

Without any reference to the greater or less force of medical theories as to the efficacy of cinchona bark, I now only take an experienced