286 
Experiments on the Strength of Wood. 
[APRIL, 
Six Pieces of English Oak, each Piece five Feet long, and two 
Inches square. 
i a ¥ 
Weight. |Curvature. |Difference. No. 1. Weight.| Curvature.’ Difference. No. 2. - 
141b} 0° 9'| Qo 9! 14>} OO-7¢E 90. 17! 
280: ait hige ae 28 0 POvLl { 
42 | 0 30] 0 09 é AQ 0-28} 0 10 
56 | 0 42} O 12 on 56 0 39) ® Il 
70 | 0 54} O 12 m 70 | O 0.12 
84 {| 1 04] 0 10 s 84 | 1 03} 612 
98 Delsey Gh 11 & 98 1 0 11 
112 | 1 27f O 12 e 112 | 1 0 12 s 
126 1 38] 0 Il Fe 126 1 0 13 = 
1440 | 1 52] 0 14 = 140 | 1 0 13 = 
14 | 2 04] 0 12] = 154 | 2 Oo My ZF 
TGSta |e, 2 181} 0 14 5 168 | 2 0 14] Fe eg 
182.7 8 $8'1 0. 15 A 182 | 2 0 16 gs °: 
196 | 2 54] 0 2l rf 196 | 2 0 18 = 
210 | 3 13] 0 19 FS 210 | 3 0 24 = 
217 3 28} 0 15 = 224 | 83 0 24 a 
224 | 3 38| 0 10 = 238 4 0 30 
238 5 00| 0 22 = 252 4 0 36 
245 5 30| 0 30 3 266 | 6 0 12 
259 | 0 00| 0 00 2 213 | 6 0 42 
266 | 0 00} 0 00 eS 
al 146°6 Mean 
148°9 Mean 
No. 3. Weight.|Curvature. | Difference. No, 4. 
Weight. |Curvature. Difference. 
141b} 0° 7 
28 ois 
A2 0° 27 
56 0 39 
70 0 50 
84 101 
98 1 12 
112 1 24 
126 1 38 
140 152 
154 2 06 
168 2 wed 
182 2 36 
196 2 57 
210 3 20 
224 0 00 
119 Mean 
aS 
0° 
ceococoecscoceocoece 
7 
11 
Length of splinter 2 feet. 
Broke at fulcrum, 
14 lb 
28 
42 
56 
70 
84 
98 
112 
126 
140 
154 
168 
182 
196 
210 
224 
231 
2 
245 
252 
259 
266 
270 
273 
277 
280 
284 
177 
0° 
ADO Ue BES 09 WOW W WE He eee OOOO 
Mean 
9 
18 
0° 
eosecocoooocooooooocecoecoeoce ce 
9’ 
Broke short at fulcrum, a knot, 
