XXXIX. ] CARBONISING. 323 
I examined these specimens in 1863 and 1864, and 
they all appeared to be as strong and sound as when 
first prepared; they were therefore returned to their 
places. I again examined them in 1867, and then 
tested them for transverse strength. The results are 
given in the following tables -— 
TABLE CLXVI.—CARBONISED BRITISH OAK. 
Deflections. | Total | 
eee SET, = Weight 
H 1; g i 
Number | Withthe] At | required | ‘EH | Tequired 
Specimen inte the ae mle es bse square 
390 Ibs. | breaking. ' piece. | mc 
Inches. Inches. . Ibs. Ibs. 
3 2°45 445 | 660 | 626] 165-00 
ro | 2°55 | 4°55 | 690 | 622 | 172°50 || Keptdryin the 
Ton | exe goo | 1,350 | 1248 | 337°50 store-room. 
Average} 2°50 | 4°50 | 675 | 624 | 168°75 
7 3°00 4°25 345 | 1036 | 86°25 
8 3°50 5°00 490 | 1095 | 122°56 
9 3°25 5°75 | 530 1080 | 132°50 
Total .| 9°75 15‘0O | 1,365 | 3211 | 341°25 |\ Kept in a box | 
- ; of manure. | 
Average] 3°25 5°00 | 455 | 1070 | 113°75 
Pie) gale ee | 
12 2°75 4°50 480 946 | 120°00 
Remarxks.—No. 3 broke with scarph-like fracture, 5 inches in length; 10 broke in 
three pieces, each with scarph of 6 inches ; 7 broke with long splintery fracture ; 8 broke 
with splinters, 12 inches in length; 9 broke with splinters, 9 inches in length; rz, lost ; 
xz broke off short in three pieces. 
