84 "HE NORMAL KAURI FOREST. 
Summary of Stocking per Acre. 
Thus the number of trees provided for at regeneration—Kauri, 200; 
other species, 100—will, as far as rates of growth are known, yield— 
Gross measurement in the round log per acre (as C. ft. 
26,550 
above)... ae so r ; 
Yield assumed a ee A . 12,500 
Margin of safety if all trees matured... ... 14,050 
Though the final crop will contain some particularly well-grown and 
well-placed trees of other species, I shall relegate these to the margin 
required in all estimates and assume for the final yield 10,000 c. ft. q.g. 
of Kauri in 107°5 trees of 93 c. ft. each (quarter-girth measurement)— 
the Kauri tree of the future cubing 118 c. ft. in the round and 93 c. ft. 
q.g. In even numbers, we may say that 100 Kauri trees of 100 c. ft. 
q.g. each, cut at 100 years of age, will furnish an acrim of 100 c. ft. 
It is one of the vagaries of figures that they should run out thus. It makes 
them easy to remember (p. 180). It will be useful to compare these 100 
Kauri trees, yielding 100 c. ft. q.g. each at the end of 100 years, and 
thus making up a timber stand of 10,000 c. ft., with similar figures 
elsewhere. In New Zealand we have 8,233 c. ft. q.g., the best stand 
that has ever been realized in the wild forest, and that only over small 
areas. (Lands Department, 1909: Special Rep. on Forestry.) 
European Trees like Kauri: Silvieultural Data. 
In European forests, turning to Schlich’s Yield Tables, one sees that 
as regards rate of growth the nearest tree to Kauri seems to be first-class 
Oak. This has about two-thirds the growth of Kauri, and so at age 160 
years corresponds approximately to Kauri at 100 years. At 160 years 
first-class Oak averages 234 in. in diameter and 117 ft. total height of 
tree. But Oak at that age grows sparse, and is usually underplanted 
with Beech or some soil-improving species, so that the average number 
of stems per acre at that age is only 56. 
Another European tree that resembles Kauri in growth, except in 
slower diameter-growth, is first-class Spruce. At 100 years this averages 
15°2 in. in diameter and 104 ft. total height, and has 220 trees to the 
acre; while the shade-bearing Silver-fir, which at 50 years averaged 
270 more trees to the acre than Spruce at age 100 years, averages only 
200. First-class Spruce at 100 years has a stand of 14,250 c. ft. in 
the round, and Silver-fir of 14,290 c. ft. in the round; in addition. 
each of these has yielded about one-third of these figures in thinnings. 
STANDS OF TIMBER. 
_ New Zealand Millable twice Appalachians.—Certain “‘ stands”’ of 
timber are quoted above (p. 64) in connection with the stocking of the 
Puhipuhi Forest. The following table merits careful perusal. It shows 
that the present New Zealand millable forest, even in its wild state, 
has twice the average timber stand of the Appalachians forest, U.S.A.. 
about which so much has been written, and for which so much paid. | 
The first two stands of timber on the list below (New Zealand and 
Appalachians) are wild forest over large areas. Such forest. with timber 
of all ages intermixed, and with irregularity in the stocking has gene- 
rally a much lower average stand of timber than the eultivaied forest. 
Dr. Somerville gave a detailed account of his forest tour through the 
ne in the English Quarterly Journal of F orestry for March. 
