XXXVIL] KAURI PINE. 303 



and of the above the relative strength of the series 

 are 



a - a' = -952 I a - a' = I'ooo 



b - b : = '932 b - b l = '937 



c - c 1 = 1*000 I c - c 1 = '937 



We find, also, the relative transverse strength of the 

 three lengths is as follows, viz. : 



Top-length = '870 

 Mid = -947 

 Butt ,, = I'ooo 



and the specific gravity 



Top -length = -980 

 Mid = -946 

 Butt ,, = I'ooo 



The tables show that the maximum transverse 

 strength lay in the outer series marked c' 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' - a were the strongest. 



Table CLXII. shows that the vertical strength of 

 Kauri timber is about 2*8665 tons per square inch of 

 .base. 



