XXXVIL | KAURI PINE. 299 
centric circles than to the centre or pith of the tree. 
Subsequently, from the specimens above-mentioned, I 
obtained four serviceable pieces, 2 feet 6 inches in 
length, for the purpose of ascertaining their tensile 
strength, and found the maximum to lie in the piece 
marked ¢ as before. 
TaBLE CLXI. 
Tensile Experiments. 
Number . . . Weight the Direct 
Dimensions of Specific + cig . 
of the . . iece broke | cohesion on 
specimen. each piece. gravity. R with, 1 square in. 
Inches, Ibs. Ibs. 
7 a 525 16,244 4,061 
8 oe 529 20,440 5,110 
2X2x 30 f . 
9 6 3 529 | 17,920 | 4,480 
10 @ 520 18,080 4,520 
Total. . | F 2103 72,684. 18,171 
Average . | vet 526 18,171 4,543 
TaBLE CLXII. 
Vertical Experiments on cubes of— 
Number 1 Inch. 2 Inches. 3 Inches. 4 Inches. 
of the 
specimen. |Crushed with|Crushed with!Crushed with|Crushed with) 
Tons. Tons. Tons. Tons. 
1114 | 3°125 | 10°75 24°5 45°75 
15—18 37500 10°00 24°5 48°00 
19, 20 3°125 10°50 _— _ 
21, 22 3°000 10°75 _ _ 
Total. .| 12°75 42°00 49°0 93°75 
Average .| 3°19 10°50 24°5 46°375 
Do. perin.} 3°19 2°625 2°722 2°929 
