CHAP. XXXvV.] PITCH PINE. 287 
the planks in thickness varying from 3 to 5 inches by 10 
to 15 inches in width, and from 20 to 45 feet in length, 
Pitch Pine is extensively employed in ship-building for 
beams, shelf, and bottom planking, &c., &c., and also in 
civil architecture wherever long, straight, and large 
scantlings are needed. It will not, however, make good 
board for joiners’ general purposes, although we find it is 
used to some extent for cabinet work. 
The wood is of a reddish-white colour, clean, hard, 
rigid, highly resinous, regular and straight in the grain, 
and, compared with most other Pines and Firs, is rather 
more difficult to work; it is good in quality, and con- 
sidered to be durable. The principal defects in Pitch 
Pine are the heart and cup shake, the latter often 
extending a long way up the tree. Hence, as far as 
possible, logs having these defects should be used in large 
scantlings, to guard against a waste of wood near the 
centre. 
TABLE CLITI.—Pitcu Pine (AMERICAN). 
Transverse Experiments. 
Deflections. Te : Big Weicht 
t 2s 8 
Number | with the | Afterthe | At cenired 32 Tage sequins 
of Ene: apparatus} weight | the crisis | to break Bf | specific ses 
specimen. | weighing ‘was ° each Wo | gravity| * Saag & 
390 lbs. | removed. | breaking. | piece. 600. anehy 
Inches. Inch, Inches. Ibs. Ibs. 
I 1°25 "15 5°05 1,068 | 651 | 984 | 267°00 
2 1°25 15 3°75 go2 630 | 859 | 225'50 
2 1‘00 ere) 500 || 1,145 693 | 991 | 286°25 
4 1‘00 ‘00 4°65 1,005 662 | II | 251°25 
5 1°25 "15 515 968 620 | 937 | 242°00 
6 b Role) ‘00 5°15 1,207 698 | 1038 | 301°75 
Total .| 6-75 | 45 | 28-75 | 6,295 | 3954 | 5720 |1573-75 
Average} 17125 | ‘075 4°791 | 1,049°16| 659 | 953'3| 262-29 
Remarks,—All the specimens broke with a short fracture. 
E= 859950. 99S = 2754. 
