XXVI. | BLUE GUM. 203 
cut clear of the centre, and very probably had formed 
part of one of the hollow trees before alluded to, con- 
sequently the tree to which it belonged must have been 
at the least 6 to 7 feet in diameter. 
A plank 6 inches thick was cut from it, which quickly 
warped or twisted 2 inches, and ultimately went to 3% 
inches, and stood at that in 1870. Upon examination 
then, it was found to be full of deep, fine shakes,. but 
otherwise it was not much changed, and there were no 
signs whatever of decay, although it had been for a long 
time exposed to the weather. It seems, therefore, likely 
to be a durable wood. 
In the Australian colonies the Blue Gum is largely 
employed in ship-building for keels, keelsons, beams, and 
planking ; and in civil architecture for any service where 
long, straight, and heavy timber is required. It is also 
largely used upon the farms for fences, &c. 
TABLE CIV.—BLUE Gum (AUSTRALIA). 
Transverse Experiments. 
| Deflections. Total Weight : 
Numb weight ge reduced Wetzht 
a rik er | With the | After the At required ‘O'S to a eelae 
ofthe | apparatus| weight | the crisis | to break af |specific) eee 
specimen.) weighing was oO each vba | gravity ach 
390 Ibs. | removed. | breaking. | piece. tooo. ? 
Inches. Inch. Inches, Ibs. Ibs. 
I r25 | 15 | 4°50 | 767 | 1079} 711 | 191°75 
2 1°75 "20 3°75 602 997 | 604 | I50°50 
3 1°35, “To 5°75 710 | 1037 | 684 | 177°50 
4 1‘00 *00 3°75 4767 | 1108 | 692 | 191°75 
5 1°25 "IS 3°50 684 | 1026 | 666] 171°00 
6 1°00 Kee) 4°00 741 924} Sor | 185°25 
Total | 7°60 60 25°25 | 27 6471 | 4158 | 1067-75 
Average| 1°26 "10 4°21 | 712 1029 | 693 | 177°96 
Remarks.—Each piece broke with a short fracture. 
