OF GLASS, AND THE EESISTANCE OF GLASS VESSELS TO COLLAPSE. 2 
Experiment 8. 
Globe H. Diameters 4-0 and 3*98 inches. 
Minimum thickness =0’024 inch. 
This globe sustained unbroken a pressure of 900 lbs. per square inch. 
Experiment 9. 
Globe I. Diameter 4‘0 inches. 
Minimum thickness =0-025 inch. 
This globe sustained unbroken a pressure of 900 lbs. per square inch. 
Experiment 10. 
Globe K. Diameter 6-0 inches. 
Minimum thickness =0-059 inch. 
This globe remained unbroken with a pressure of 1000 lbs. per square inch. 
Experiment 11. 
Cylinder L. Diameter 3-09 inches. 
Length 14 inches. 
In parts of an inch. 
Thicknesses measured < 
Fig. 11. 
'0-0243' 
O' 
0-0241 
0-0235 
> Minimum =0-024 inch. 
" 0-0238 
0-0241 
0-0352^ 
Collapsing pressure =85 lbs. per square inch. 
Experiment 12. 
Cylinder M. Diameter 3-08 inches. 
Length 14 inches. 
In parts of an inch. 
'0-0320* 
0-0324 
0-052 
0-0316 
0-0326 
.0-0322J 
Collapsing pressure =103 lbs. per square inch. 
Thicknesses measured < 
Fig. 12. 
> Minimum =0-032 inch. 
1 
