XXITI.] 
AFRICAN OAK 
147 
Table LXVIII. —African (Africa). 
Transverse Experiments. 
Number 
of the 
specimen. 
Deflections. 
Total 
weight 
required 
to break 
each 
piece. 
Specific 
gravity. 
Weight 
reduced 
to 
specific 
gravity 
1000. 
Weight 
required 
to break 
1 square 
inch. 
With the 
apparatus 
weighing 
390 lbs. 
After the 
weight 
was 
removed. 
At 
the crisis 
of 
breaking. 
1 
2 
3 
4 
5 
6 
Inches. 
2-25 
2-150 
2-50 
2 'OO 
1 75 
2-50 
Inch. 
•IO 
•05 
•05 
•00 
•00 
•IO 
Inches. 
5-50 
4 - 25 
575 
5'35 
4’75 
5- 25 
lbs. 
1,301 
971 
1,231 
1,086 
1,014 
1,046 
982 
1086 
1008 
988 
934 
962 
1325 
894 
1221 
1099 
1085 
1087 
lbs. 
325-25 
24275 
307-75 
271-50 
253 TO 
261 '50 
Total . 
13-50 
•30 
30-85 
6,649 
5960 
6711 
1,662-25 
Average 
2-25 
•05 
5-142 
i,io8t6 
993‘3 
1118-5 
277-04 
Remarks.— 
fibrous. 
Nos. i, 3, and 4 broke with a long fracture; 2, 5, and 6, short, but 
Table LXIX. 
Tensile Experiments. 
Number 
of the 
specimen. 
Dimensions of 
each piece. 
Specific 
gravity. 
Weight the 
pieces broke 
with. 
Direct cohe¬ 
sion on 1 
square inch. 
Inches. 
lbs. 
lbs. 
7 
\ ( 
982 
30,800 
7,700 
8 
> 2 X 2 X 30 < 
IO08 
43 , 4 °° 
10,850 
9 
934 
19,040 
4,760 
10 
962 
19,600 
4,900 
Total. . 
3886 
112,840 
28,210 
Average . 
971-5 
28,210 
7,052 
