urnishes nearly 50 per cent. of tannin, it is
largely used by curriers. It is imported into Liverpool from Rio de la
Hacha, Maracaibo, and Savanila. 400 tons of the seed pods and bark of
the Algaroba, or Locust-tree (_Prosopis pallida_) were imported in
1849 into Liverpool from Valparaiso, as a substitute for divi-divi in
tanning. 3,200 lbs. of divi-divi were exported from the port of
Augostara, in 1846.

Specimens of divi-divi which had been raised at Calcutta were shown in
the Indian department of the Great Exhibition.

Dr. Hamilton states that, according to some admirably conducted
experiments of Mr. Rootsey, of Bristol, undertaken at his request, the
pods of divi-divi contain above 50 per cent. of tannin. It appears
also, from trials made, that one part of divi-divi is sufficient for
tanning as much leather as four parts of bark, and the process
occupies but one-third of the time.

The average produce of pods from a full-grown tree has been estimated
at 100 lbs. weight, one-fourth of which consists of seeds or refuse,
leaving about 75 lbs. of marketable matter.

At an interval of six feet apart, an acre of ground will contain 1,210
trees, yielding an average of 810 cwts., and 30 pounds, or above 401/2
tons of marketable matter, worth, at only L5 per ton, L200. Should the
interval between the trees be extended two feet more, we shall still
have 680 to the acre, the produce of which would not improbably be
increased by the increased space given for the extension of the
branches.

The ground in which this tree admits of being cultivated is that which
is least adapted to the staple products of tropical agriculture;
guinea grass may be profitably raised beneath its shade and as with
the exception of the three years which precede the commencement of its
bearing, there is hardly any deduction to be made from its returns, it
promises to be among the most valuable objects of a planter's
attention.

Jacquin describes the _Caesalpinia coriaria_ as a handsome branching
tree, of about fifteen feet in stature, covered with a dark spotted
bark. Its leaves are doubly pinnate, and the leaflets of twelve pair
without a terminal one; they are oblong, obtuse, smooth, very entire.
The flowers are disposed in spikes issuing from the extremities of the
branches; they are small, yellowish, and slightly fragrant. To these
succeed oblong, compressed, somewhat obtuse pods, curved laterally,
the inner side being concave and the other c