1817.] Experiments on the Strength of Wood. 299 
A Piece of Pitch Pine cut into 25 Pieces, each Piece five Feet long, 
and two Inches square. 
Weight./| Curvature. | Difference. No. 1. Weight.) Curvature, | Difference. No. 2. 
14 1b} 0° 12} 0° 00! 14 ib] 0° 12/} 0° 00! 
28 0 28) 0 16 28 0 30] 0 18 
42 0 36] 0 12 AQ 0 36] 0 18 
56 0 42! 0 06 56 0 48; 0 12 
10 0 48} 0 06 70 1 00 12 0M 12 
84 1 00] 0 12 84 1 06| O 06 
98 Pots 1h 0416 g 98 1-18). 0512 § 
112 1 24} 0 09 Fa 112 1) 30: ht 00 12 = 
126 1 38) 0 14 < 126 1 42) 012 2 
140 1° 48 |«0510 os) 140 1 55}'0° 13 a 
154 2 03] 0 15 B 154 2 12 }) 0 17 = 
168 2 18] 0 15 = 168 2 24}| oO 12 + 
182 | 2 36] 0 18 2 182 | 2 48} 0 24 3s 
196 2 48| 0 12 5 196 3 00} 0 12 2 
210 3 03} 0 15 ng 210 3 18}; 0: 18 M 
224 3 24/0 21 Po 224 3 48] 0 20 2 
238 | 8 54| 0 30 238 | 4 24] 0 36 a 
252 4 24/1 0 30 252 5 12} 0 48 
266 5 00} 0 36 259 5 42| 0 30 
280 6 i8| 0 18 266 6 24] 0 32 
287 7 00} O 42 
145°S Mean 
153°T Mean 
Weight. Curvature. | Difference. No. 3. Weight.|Curvature. | Difference. No, 4. 
14 1b} 0° 12/| 0° 00/ 14 1b} 0° 12’) 0° 00 
28 0 30] 0 18 28 0. 304 0.18 
AQ 0 36) 0 18 AQ 0 36| 0 06 
56 0 48| O 12 56 0 42! O 06 
70 © oof 0.14 70 0 48] O 06 
84 : ig [0.12 84 0 56] O 08 
98 1 20] O 08 a 98 1 06] O 10 d 
112 ‘86 1..0..16 a 112 Dy YShes0). 12 5 
126 1 44] 0 08 ig 126 1 28] 0 10 2 
140 1 54] 0 10 & 140 a, 38° 0°. 10 & 
154 2 08| 0 14 _ 154 1 48] 0 10 a 
168 2 18| 0 10 2 168 2 00] 0 12 : 
1sz | 2 33| O 16 g 182 | 2 12] 0 12 2 
196 | 2 48| 0 15 ~ 196 | 2 24| O 12 o 
210 8 0s 10° 15 ~ 210 2 42) 0 18 “a 
224 83 20),0N é 224 3 03| 0 2) Pt 
238 3 45| O 25 238 3) $6). 0. 8S 
254 4 12{| O 27 252 4 12] 0 36 
266 4 48| 0 36 259 4 50| 0 38 
280 5 36| 0 48 
139°5 Mean 
147 ~Mean 
