MORA. 
XXIV.] 
x 57 
Table LXXVII. —Mora (Demerara and Trinidad). 
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. 
Inches. 
Inch. 
Inches. 
lbs. 
lbs. 
I 
2'00 
•IO 
475 
£353 
1075 
1258 
338-25 
2 
2 'OO 
•IO 
5-00 
£363 
1088 
1253 
340-75 
3 
2-15 
•15 
5 '°° 
£3°4 
IO94 
II92 
326 "OO 
4 
2 "OO 
•05 
3-00 
1,284 
1090 
II78 
321-00 
Total . 
8-15 
•40 
1975 
5,304 
4347 
4881 
1326-00 
Average 
2-037 
•10 
4'94 
1,326 
1086-75 
122025 
331 '5 
Remarks.—E ach piece broke with about 12 inches length of fracture. 
Table LXXVIII. 
Tensile Experiments. 
Number 
of the 
specimen. 
Dimensions 
of 
each piece. 
Specific 
gravity. 
Weight the 
piece broke 
with. 
Direct 
cohesion on 
1 square in. 
5 ) 
Inches. 
. 
IO94 
lbs. 
37,800 
lbs. 
9,450 
6 [ 
2 X 2 X 30 
] 1090 
37,240 
9,310 
7 ) 
( io 75 
35,840 
8,960 
Total . 
3259 
no,S8o 
27, 720 
Average 
1086 
36,960 
9,240 
Table LXXIX. 
Vertical or Crushing Strain on cubes of 2 inches. 
No. 8. 
No. 9. 
d 
6 
£ 
No. 11. 
No. 12. 
No. 13. 
Total. 
Average. 
Ditto on 
1 square 
inch. 
Tons. 
Tons. 
Tons. 
Tons. 
Tons. 
Tons. 
Tons. 
Tons. 
1 ^ 
,V ''* 
1 
w* 
I O 
vo 
1^. 
* 
'4-875 
I5 - 750 
I5'750 
I5-500 
91-5° 
I5-25 
3-812 
£ = 466570. S = 3481. 
