more wane at any part than 4 inches on the two wanes taken together; or, if there is no wane on one edge or angle, and it is only on the other edge or angle, that wane is not to exceed 4 inches.
The compass timber to be sided from 7 to 20 inches, inclusive, and no part thereof, except of from 7 to 11½ inches sided, to be less than 13 feet in length.
The transverse strength of Italian Oak is shown in Tables XXVII., XXIX., and XXX., and the vertical strength in Tables XXVIII. and XXXI.; but there are fewer experiments on these than on most other woods, owing to the difficulty that was found in obtaining a length of seven feet with a clean straight grain for testing.
| Number of the specimen. |
Deflections. | Total weight required to break each piece. |
Specific gravity. |
Weight reduced to specific gravity 1000. |
Weight required to break 1 square inch. | ||
| With the apparatus weighing 390 lbs. |
After the weight was removed. |
At the crisis of breaking. | |||||
| Inches. | Inch. | Inches. | lbs. | lbs. | |||
| 1 | 4.50 | .15 | 7.25 | 766 | 1011 | 758 | 191.50 |
| 2 | 3.75 | .15 | 9.25 | 659 | 1094 | 602 | 164.75 |
| 3 | 2.15 | .00 | 7.35 | 625 | 985 | 635 | 156.25 |
| 4 | 4.65 | .20 | 6.85 | 906 | 1018 | 889 | 226.50 |
| 5 | 4.50 | .15 | 8.55 | 777 | 1025 | 758 | 94.25 |
| 6 | 3.00 | .15 | 675 | 813 | 1110 | 732 | 203.25 |
| Total | 22.55 | .80 | 46.00 | 4546 | 6243 | 4374 | 1136.50 |
| Average | 3.76 | .133 | 7.66 | 757.66 | 1040.5 | 729 | 189.41 |
Remarks.—All the specimens broke with fibrous fractures, 10 to 16 inches in length.
