1x.] BRITISH OAK. 57 
TABLE XI. 
Specimens as in Table X., weighted with 400 Ibs, 
Supports, apart. | 3 Feet. | 4 Feet. 5 Feet. 6 Feet. 
No. Sp. gr. | Inches. Inches. Inches. Inches. 
37 795 | "375 | “625 | 1250 | 2125 
38 785 312 025 1°125 2°000 
39 782 "250 "750 | 17187 2°125 
40 775 “437 1 °625 1°312 2‘000 
Total. .| 3137 | 1°374 | 2°625 | 4°874  8:250 
Average. “784 "343 | 656 1218 2'062 
Further experiments with reference to deflections 
were made upon a piece of English Oak, 2 X 2 X 84 inches, 
specific gravity 792, with the following result :— 
TABLE XII. 
Weighted with 300 Ibs. 
Supports, apart. | 3 Feet. 4 Feet. 5 Feet. 6 Feet. 
No. Inches. Inches. Inches. Inches. 
41 “125 375 "625 875 
TABLE XIII, 
Weighted with 400 lbs, 
Supports, apart. | 3 Feet. 4 Feet. 5 Feet. 6 Feet. 
No. Inches. Inches. Inches. Inches. 
42 ‘250 *500 875 1125 
