300
TIMBER AND TIMBER TREES.
[CHAP.
Relatively considered, they stand as follows, viz.:—
| TRANSVERSE STRENGTH. | TENSILE STRENGTH. |
| a = 0.86 | a = 0.88 |
| b = 0.97 | b = 0.88 |
| c = 1.00 | c = 1.00 |
| d = 0.93 | d = 0.78 |
The specimens referred to in Table CLX., after being prepared for the experiments, lost 9 per cent. of their weight in the twenty days prior to breaking them, and seemed then to be in good-seasoned condition for use.
A further series of experiments were made in a somewhat similar manner to that adopted with the
FIG. 34.
Pitch Pine; but in this case only three lengths were taken from a long Kauri tree—viz., one at the butt, one at the middle, and one at the top end, the intermediate pieces, each about 20 feet in length, being allowed to drop out. Six pieces were, however, taken from the breadth of each plank, three on each side of the pith (Fig. 34).
