IX.]
BRITISH OAK.
55
however, the fact that in a fine tree, sound and apparently free from defect, nearly the whole of one side was found to be faulty, while the other half proved to be inferior in strength to the specimens of average quality noticed in the Tables V. and VI., the mean breaking weight of the best side being 562 lbs., as compared with 776 lbs. in Table V., and 837 lbs.in Table VI., the weaker side not affording any figures by which it could be compared with previous experiments.
The deflections of a few specimens, under given weights and with various bearings, are shown in the following tables:—
DEFLECTIONS: ENGLISH OAK.
| Specimens : depth, 1½ inch ; breadth, 2 inches; length, 84 inches ; weighted with 300 lbs. | |||||
| Supports, apart. | 3 Feet. | 4 Feet. | 5 Feet. | 6 Feet. | |
| No. | Sp. gr. | Inches. | Inches. | Inches. | Inches. |
| 25 | 795 | .375 | 750 | 1.187 | 2.500 |
| 26 | 785 | .500 | .875 | 1750 | 2.750 |
| 27 | 782 | .375 | .750 | 1.625 | 2.500 |
| 28 | 775 | .375 | .750 | 1.500 | 2.625 |
| Total | 3.137 | 1.625 | 3.125 | 6.062 | 10.375 |
| Average. | 0.784 | 0.406 | 0.781 | 1.515 | 2.593 |
