TIMBER AND TIMBER TREES. [chap. 
Table CLXVII.— Non-Carbonised British Oak. 
Number 
of the 
specimen. 
Deflections. 
Total 
weight 
required 
to break 
each 
piece. 
Specific 
gravity. 
Weight 
required 
to break 
1 square 
inch. 
With the 
apparatus 
weighing 
390 lbs. 
At: 
the crisis 
of 
breaking. 
Inches. 
Inches. 
lbs. 
lbs. 
I 
2 'OO 
375 
700 
643 
175-°° 
2 
2-50 
5-00 
770 
650 
I9270 
Kept dry in the 
Total . 
4 ' 5 ° 
875 
1470 
1293 
36770 
store-room. 
Average 
2-25 
4‘375 
735 
646-5 
I 83-75 
, 
4 
275 
4 a 5 
485 
1064 
121-25 
5 
3 ' 5 ° 
4 ' 5 o 
420 
1085 
105 ’OO 
6 
3 ' 5 ° 
4‘35 
440 
IO9O 
110-00 
Kept in a box 
Total . 
975 
13-00 
1345 
3239 
336-25 
of manure. 
Average 
3' 2 5 
4'33 
44873 
1079-66 
II2 - oS 
Remarks. —No. i broke with scarph-like fracture, 7 inches in length ; 2 broke in three 
pieces, each scarph-like, 7 inches in length; 4 broke with scarph-like fracture, 14 inches in 
length ; 5 broke rather short, with small splinters; 6 broke with scarph-like fracture, 
8 inches in length. 
All the specimens that were kept dry, whether 
carbonised or not, were apparently in good condition ; 
but those which had been placed in manure or damp 
earth, were more or less in a state of decomposition, 
the softer parts of the concentric layers being slightly 
wasted away with rot on the surface. The difference 
in strength between the carbonised and non-carbonised 
pieces was not very great, but the tables show that 
of the pieces kept dry, the loss of strength was greatest 
by about 8 per cent, in the carbonised specimens; and 
of those kept in manure, the loss was about per 
cent, in excess on the non-carbonised pieces. When 
the experiment for testing the strength was completed, 
