XXXVIL. | KAURI PINE. 303 
and of the above the relative strength of the series 
are— 
a-a' = "952 \ a@ a! = 17000 
6-6) = 932 | 6 - 6! = °937 
¢' = 1'000 | ¢-¢ = 937 
We find, also, the relative transverse strength of the 
three lengths is as follows, viz. :— 
Top-length = ‘870 
Mid ” = ‘947 
Butt ,, = 1°000 
and the specific gravity— 
Top-length = ‘980 
Mid ,, = ‘946 
Butt ,, = I‘000 
The tables show that the maximum transverse 
strength lay in the outer series marked c’— ¢. It is not, 
however, certain whether the tree from which they were 
taken, although reduced to 22 inches square, would not 
have yielded a much larger square log, say 28 or 30 
inches; and thus it seems probable that the point c, 
although nearer to the outside of this log than in the 
other, may, after all, be in about the same position in 
the tree. The experiments for the tensile strength show 
that the series a’ ~ @ were the strongest. 
Table CLXII. shows that the vertical strength of 
Kauri timber is about 2°8665 tons per square inch of 
base. 
