172 FOREST-TREES OF NEW ZEALAND. 
And I have little doubt the next New Zealand Exhibition will prove, 
not only that his recommendations have been adopted, but that the 
economical applications of the Otago timbers and barks have been 
greatly multiplied or extended in the construction of colonial furni- 
ture and otherwise. 
The applications of the Otago timbers in the arts of construction, do 
not, however, represent all the uses to which the bark or wood of Otago 
_trees may be applied ; though the following subsidiary applications in 
the other arts have not yet been developed to the same extent. In 
several Otago woods and barks there is a notable amount of Tannin or 
tannic acid; in some cases such an amount as to justify the hope they 
may yet become of service in colonial tanning, as a substitute for the 
astringent barks now imported from Australia or Europe. The fol- 
lowing table (compiled from the Report on Tanning Materials by Mr. 
Skey in the Jurors’ Reports of the New Zealand Exhibition, p. 427) 
exhibits, according to his analyses, the following percentage of Tannin 
in certain Otago trees or shrubs, as compared with what occurs in the 
chief European tanning barks :— 
I. European TREES. 
Oak Bark—varies according to age of tree when cut—from 
6 to 22 per cent., average l4. 
Willow er ee, ee ee 
A ee oed EM 
Buh. a. a LN d 
Larch. . . ee a dE y 
IL. Norru Istanp (New ZEALAND) TREES. 
Phyllocladus trichomanoides, Don, N. O. Conifere, 6°00 p. c. 
III. OTAGO TREES OR SHRUBS. 
Coriaria ruscifolia* (leaves and roots) from 2°14 to 8:32. ,, 
average 4'45  ,, 
Eleocarpus Hookerianus (Bark) . . . . . . 8 » 
agus Solandrit (Bark) |... a e .200 4 
de my paper on ** The Toot Plant and eer of New Zealand," Brit. 
iud For. Medico-Chirurgical Review, July, 1865, p. 
T The bark of Black Birch, which is abundant iu the Upper Hutt valley 
and elsewhere in the vicini D of We pec is or has been used in bd pir 
for tanning, and it has been or to English Oak bar 
