FOREST-TREES OF NEW ZEALAND. 165 
Tribus V. PLeranpRE#.—Stamina 2-00-plo petalorum numero. 
Ovarium 5—90-merum. 
Tupidanthus, Hook. f. et Thoms. 
Tetraplasandra, A. Gray. 
Plerandra, A. Gray. 
Bakeria, Seem. 
Nesopunax, Seem. 
Triplasandra, Seem. 
ON THE ECONOMICAL VALUE AND. APPLICATIONS OF 
THE FOREST-TREES OF NEW ZEALAND AND THEIR 
PRODUCTS.* 
By W. Lauper Linpsay, M.D., F.R.S.E., F.L.S. 
Had the New Zealand Exhibition of 1865 been productive of no 
other good result, it has, at least, served to bring more prominently 
into notice the value of the New Zealand timbers, not only in them- 
selves, but in comparison with those of the neighbouring colonies (Tas- 
mania and Australia) and of Europe and North America. Mr. Balfour, 
C.E., conducted an admirable local series of experiments, in connec- 
tion with the said Exhibition, and he has. published an excellent re- 
sultant report on the strength and uses of the New Zealand timbers.T 
His tables give minute details regarding weight of a cubic foot; elas- 
ticity; greatest deflection with unimpaired elasticity ; greatest weight 
carried with unimpaired elasticity ; deflection at the instant of fracture : 
and other points, which are of importance to the engineer. 
The following table, which shows only the specific gravity, and ulti- 
mate strength in pounds,{ is compiled from Balfour's tables (p. 492). 
Sante 
I. MISCELLANEOUS FOREIGN TIMBERS. 
Ironwood of Jamaica (Erythroxylon areolatum, 
Nat. Ord. n strongest wood 
tested in Paris in 1855. .. . *987 468 
* Referring chiefly to the trees of Otago and the South Island. 
+ Jurors’ Reports of the Exhibition: 1866, p. 
Repres nting the mean results of es carefully conducted and fre- 
quently repeated Pattee i 
