XXXIX.] 
CARBONISING. 
3 2 3 
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. 
Number 
of the 
specimen. 
Deflections. 
Total 
weight 
required 
to break 
each 
piece. 
Specific 
gravity. 
Weight 
required 
to break 
1 square 
inch. 
Kept dry in the 
/ store-room. 
With the 
apparatus 
weighing 
390 lbs. 
At 
the crisis 
of 
breaking. 
3 
10 
Inches. 
2-45 
2'55 
Inches. 
4’45 
4'55 
lbs. 
660 
690 
626 
622 
lbs. 
165 ‘OO 
172-50 
Total . 
5-00 
(j'OO 
B 350 
1248 
337 * 5 ° 
Average 
2-50 
4'50 
675 
624 
168-75 
7 
8 
9 
3 '°° 
3 ' 5 o 
3‘25 
4‘ 2 5 
5-00 
575 
345 
490 
530 
IO36 
1095 
1080 
86-25 
122-56 
132-50 
\ 
Kept in a box 
/ of manure. 
1 
Total . 
975 
i 5 '°° 
1.365 
3211 
34 i ’25 
Average 
3' 2 5 
5-00 
455 
1070 
ii 375 
11 
12 
2 75 
4 ‘ 5 ° 
480 
946 
I20'00 
Remarks. —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; 11, lost ; 
12 broke off short in three pieces. 
