XXVI. | TE WART. 189 
TABLE XCIII. 
Tensile Experiments. 
Number Dimensions . Weight the Direct 
of the of Sperils piece cohesion on 
specimen. each piece. Eravity. broke with. | z square inch. 
Inches. Ibs. Ibs. 
7 1147 32,580 8,820 
8 1184 44,520 11,130 
9 1173 46,900 11,725 
10 222% 3° 1170 34,160 8,540 
II 1147 34,720 8,680 
12 1194 51,240 12,810 
Total. . wie | JOIS 244,120 61,705 
Average . ee | 1169 40,687 10,284 
TABLE XCIV. 
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. 
13—16 4°000 16°875, 37°625 67°00 
17—20 4°500 16°750 33°125 64°25 
21, 22 4°625 16°500 
23, 24 4°750 17"000 
Total . .| 17°875 67°125 70°75 13125 
Average .| 4°469 16°781 35°375 65°625 
Do. per in. | 4°469 4°195 3°931 4/102 
E = 776990. S$ = 2701. 
THE JARRAH, OR MAHOGANY TREE 
(Eucalyptus marginata), 
is also found in Western Australia, where it is said to be 
very abundant. It is of straight growth and very large 
