or GLASS, AKD THE EESISTANCE OE GLASS VESSELS TO COLLAPSE. 
Globe 
n. 
Thicknesses measured < 
Thicknesses measured < 
Minimum =0'025 inch. 
Experiment 11. 
Diameters 4-0 and 4-03 inches. 
In parts of an inch. 
0-016 
0-019 
0-018 
0-017 Minimum =0-016 inch. 
0-019 
0-016 
0-016 
Burstmg- pressure = 82 lbs. per square inch. 
Crown-glass. 
Experiment 12. 
Globe p. Diameters 4-2 and 4-35 inches. 
In parts of an inch. 
0-0262 
0-0270 
0-0272 
0-030 
0-0252 
0-0256 , 
Burst with 120 lbs. per square inch. 
Experiment 13. 
Globe g. Diameters 4-05 and 4*20 inches. 
In parts of an inch. 
0-028 
0-0236 
0-0256 
0-0236 
0-0212 
0 - 0210 , 
Bursting pressure =126 lbs. per square inch. 
Experiment 14. 
Globe r. Diameters 5-9 and 5-8 inches. 
In parts of an inch. 
0-0334 
0-020 
0-0244 
0-017 
0-0172 
^0-016 
Burst witli 69 lbs. per square inch. 
2 I 
Thicknesses measured < 
> Minimum =0-021 inch. 
Thicknesses measured ^ 
1> Minimum =0-016 inch. 
229 
MDCCCLLX. 
