490 AUSTRALIAN NATIVE PLANTS. 
as when they were first laid. The sleepers were 6ft. 6in. long, 
8in. wide, and 4in. deep, and sawn, but not split from the log. 
The seat for the rail was adzed by machinery on the ground. 
TRANSVERSE EXPERIMENTS. 
(Zaslett.) 
Deflections. 
4 ae ao} . 
a =e 3 = z g = 3 
5° Ss 
Number oad at ee *% 328 & see oes 
ofthe | £29 | S23 Se | woe = Hop | Beg 
be! Pay + ae — = = fa = = 
specimen.| 3 @.= se2 <E¢ eis = ae Gos 
Bee | cee | 22) Waar S| 32ers 
ay 2 —s g Nn S 5 5 
Inches Inch. Inches Lb. 
I 2:85) | -10 4.50 443 987 453 
2 Ler 15 4.50 638 1049 608 
3 3-25 15 5.00 661 977 677 
4 3-50 S05 5.00 661 1039 636 
5 3.15 .10 4.50 426 1006 422 
6 3.25 ats 4.95 685 1002 684 
Total 19.2 .80 28.25 4114 6060 4080 
Average 2.25 || +133 4.41 685.66 1010 680 
Samples 7ft. long. Each piece broke short. 
TENSILE EXPERIMENTS: 
(Laslett.) 
| N umber of Dimensions of Specific Weight the piece | Direct cohesion 
| the specimen, each piece. Gravity. broke with. on I square inch, 
| +! i (er 
| Inches. Lbs. Lbs. 
of ? 987 10.080 2,520 
8 5 BUS OEE f 1006 13,440 3,300 
Total | 1993 23,520 5,880 
Average 996 11,760 2,940 
VERTICAL OR CRUSHING STRAIN ON CUBES OF Two INCHES. 
| Ditto on 
No. g. | No. 10. | No. 11. | No. 12.| No. 13.| No. 14.| Total. | Average. | square inch. 
Tons. | Tons. | Tons. | Tons. | Tons. | Tons. | Tons. Tons. Tons. 
12.895 | 13-000 | 12.625 | 12.750 | 12-750 | 12.450 46.95 12.792 3.198 
E = 296810. S = 1800, 
