OF GLASS, AND THE EESISTANCE OF GLASS VESSELS TO COLLAPSE. 239 
Experiment 22 
Cylinder X. Diameter 4*2 and 4-1 inches. 
Length 22 inches. 
In parts of an inch.. 
'0-0455' 
0-047 
0-047 
0-049 
0-047 
0-047 
0-052 
0-047 
0-049 
0-047 
0-054 
-0-046 - 
Collapsing pressure =125 lbs. per square inch. 
Thicknesses measured 
!. Minimum =0-0455 inch. 
Oreen Glass. 
Experiment 23. 
Globe Z. Diameters 5-0 and 5-02 inches. 
In parts of an inch. 
rO-015 - 
0-013 
0-0125 
0-019 
0-016 )> Minimum =0-0125 inch. 
0-018 
Thicknesses measured < 
0-021 
0-0126 
1-0-013 J 
Collapsed with 212 lbs. per square inch. 
2 K 2 
