288 Experiments on the Strength of Wood. [Aprit, 
' A Piece of Riga Fir cut into 26 Pieces, each Piece five Feet long, 
and two Inches square. 
Weight.|Curvature, | Difference. No. l. Weight. |Curvature. | Difference, No. 2. 
141b} 0° 8} O° 8 14 1b} 0° 88/} O° 8 
28 0 18 0 10 28 0 18 0 10 
A2 0 30; 0 12 | 3 42 0 30 0 12 
56 0 42; 0 12 2 56 0 42 Oo 12 : 
70 | 0 56] 0 14) 8 70 | 0 55| 0 13 5 
84] 1 10; Oo 4; & 84 | 1 08] O 13 3 
98 124° & 14 | 2 98 1 SF 0 13 & 
112 139 0 15 = 112 1 36 0 15 ro] 
126 1 55) O 16 ‘s 126 1 54 0 18 o 
140 2 18] 0 23 4 140 2 16) 0 22: | 
154 2 48 0 30 “ 154 2 48 0 32 rc 
168 3 48 0 00; Pr 168 4 06 0 18 
182 0 OO 1 00 175 5 06 1 00 
98:1 Mean 97°5 Mean 
Weight.|Curvature. |Difference, No. 3. Weight. Curvature. | Difference. No. 4 
{41b} 0° 6'| 0° 6 || 141b} 0° 6/| 0° 6 
23 | 0 17} 0 11 28 | 0 16] O 10 
42 | 0 26] 0 9 : 42 | 0 26] 0 10 
56 | 0 39] 0 13 3 56 | 0 36| 0 10 g 
70 | 0 49] 0 10 5 70 | 0 48] 0 12 Fa 
84 1 02] O 13 S 84.] 0 59] O ll i 
98 | 1 14] 0 12 < 98 | 1 12] O 13 S 
112 1 30] 0 16 Pes 112 1 24] o 1g e 
126 1 46] 0 16 8s 126 1 40] 0 16 J 
1440 | 2 06| 0 20 a 140 | 2 00} 0 20 2 
154 | 2 36] 0 30 2 154 | 2 30] 0 30 a 
168 | 3 24] O 48 S 168 | 3 30] 1 00 “ 
182 4 42| 0 18 ma 175 A303 1 00 Fr 
182 | 5 48| 1 18 
103°5 Mean 
