OF GLASS, AND THE EESISTANCE OE GLASS VESSELS TO COLLAPSE. 227 
Thicknesses measured «< 
Minimum =0-056 inch. 
Thicknesses measured*^ 
^Minimum =0-058 inch. 
Experiment 4. 
Globe d. Diameters 4-5 and 4-55 inches. 
In parts of an inch. 
0-0620 
0-0694 
0-0584 
0-0626 
0-0564 
0-0614 
0-0604 
0-0580. 
Burst with 280 Ihs. per square inch. 
Experiment 5. 
Globe e. Diameters 5-1 and 5-12 inches. 
In parts of an inch. 
0-0580 
0-059 
0-0586 
0-0634 
0-0620 
^0-059 
Burst with 184 lbs. per square inch. 
Experiment 6. 
Globe f. Diameter 6-0 inches 
In parts of an inch. 
0-060 
0-066 
0-060 
0-059 
0-0592 
^0-0592_ 
Burst with 152 lbs. per square inch. 
Experiment 7. 
Cylinder g. Diameter 4-05 inches. 
In parts of an inch. 
0-079 
0-081 
0-090 
0-086 
0-086 
0-079 
0-086 
Burst with 282 lbs. per square inch. 
Thicknesses measured*^ 
y Minimum =0-059 inch. 
Length 7-0 inches. 
Thicknesses measured < 
> Minimum =0-079 inch. 
