per
ton for unchopped bark. Whilst the imports were 3,900 tons in 1814,
they dwindled to less than 400 tons in 1850.

From an experiment, conducted by Professor Brandt, the strength of the
mimosa bark, as compared with that of young English oak bark, is found
to be in the proportion of 57 to 39, so that the mimosa bark is half
as strong again as the best English bark.

Mr. Samuel Mossman, in a communication to the Botanic Society of
Edinburgh, in 1851, stated that the bark of _A. dealbata_ pays to ship
to England, notwithstanding the distance, from the fact of its
containing a greater per centage of tannin than any other bark. It is
a handsome tree, from fifteen to thirty feet high, forming luxuriant
groves on the banks of streams, most abundant in Port Phillip and
Twofold Bay, between the parallels of latitude 34 and 30 degrees.

New Zealand is rich in barks and dyes. The bark of the Tanahaka
(_Phyllodadus trichomanoides_, of Don) is used by the natives as a red
dye for the ornamental parts of their kaitahas, their best border
garments. There is also another red dye, called Tawaivwai, the bark of
which is very profuse. A black dye is procured from the hinau. They
are of a rich hue, and exceedingly fast colors. The barks are to be
found all over the colony. The hinau and tanahaka are employed in
tanning, all the leather used in the colony being tanned either at the
Bay of Islands or Port Nicholson.

The bark of the Rimu or red pine (_Dacrydium Cupressinum_, of
Solander), a very common tree, possesses tanning qualities far
superior to any of the Australian barks. One pound of the bark yields
85 grains of extract.

The native tanning barks of New Zealand are various and easily
obtained. Specimens of the bark and dye, &c., of most of these trees
were sent home to the Great Exhibition. One pound of the Tanahaka bark
is said to yield 63 grains of tannin. The sails of boats are dyed with
it to preserve them. The Towai (_Licospermum racemosum_, of Don,
_Weinmaunia racemosa_, Decandole), is supposed to be valuable for the
purposes of the tanner, and is said to yield 104 grains of tannin for
every pound of bark. The bark of the Pohutu kawa of the natives, the
_Metrosideros tomentosa_of Richard, and _Callistemon ellipticum_ of
Allan Cunningham, would also be useful for tanning, one pound of it
furnishing about 60 grains of tannin.

The bark of the Hino tree, the _Elaeocarpus hinau_ of Cunningham, the
_Dicera dentata_ of F