XXxXyV. | PITCH PINE. 289 
TABLE CLV.—PiTcH PINE (AMERICAN). 
Transverse Experiments.—3rd Example. 
(Butt to top, outer part of the tree. Fig. 320.) 
Deflections. . 
nD Total Weight Weight 
ight | 235 |reduced : 
Number | withthe | Afterthe | At | required | ‘BE |" to | Tequmed 
specimen. | 2Pparatus weight | the crisis | to break aS |specific) , square 
weighing was of, each moo | gravity| © inch. 
390 lbs. | removed. | breaking. | piece. 600. . 
Inches. Inch, Inches. Ibs. Ibs, 
13 1°15 “00 3°75 1,035 840 | 740 | 258°75 
14 1°15 15 2°75 985 788 | 725 | 221°25 
15 1°00 00 5’00 | I,1I0 760 | 876 | 277°50 
16 1°25 “15 3°75 920 655 | 843 | 230°00 
17 1°25 “00 4°75 925 613 | 905 | 231°25 
18 1°35 *20 4°75 845 610 | 831 | 211°25 
Total . 715 *50 24°75 5,820 | 4266 | 4920 |1,430 
Average| I‘I9I 0833} 4°125 970 | 711 | 820 | 238°33 
| 
Remarks.—No. 13 broke short and split; 14, curl in the grain and broke short ; 15 
and 16 broke short and split ; 17 and 18 broke with short fracture. 
E = 815070, S = 2546. 
Specimens Nos. 13 to 18, with the later layers or 
growth, were taken from the outside of the same plank, 
the object being to ascertain in the two sets of experi- 
ments—Tables CLIV. and CLV.—in which part of the 
length the maximum of strength lay. Table CLIV. 
shows that in the early layers it is in specimen 8, the 
second piece from the butt-end; and Table CLV. 
shows that in the wood of later growth it is in speci- 
men 15, the third piece from the butt-end. We also 
see in the mean results of the experiments that the 
strength of the inner is to the outer wood as 889 : 970. 
Further experiments on the transverse strength of 
the inner and outer layers of wood of another Pitch Pine 
tree were then carried out, with the following results :-— 
U 
