OF GLASS, AND THE RESISTANCE OF GLASS VESSELS TO COLLAPSE. 
Flint-glass. 
Experiment 1. 
Globe A. Diameters 5‘05 and 4-76 inches. 
In parts of an incla. 
'0-0170^ 
0-0192 
0-0190 
0-0218 
0-0220 
0-0146 
0-0178 
^0-0154 
Collapsing pressm-e=292 lbs. per square inch. 
Thicknesses measured < 
► Minimum =0-014 inch. 
Experiment 2. 
Globe B. Diameters 5-08 and 4-7 inches. 
In parts of an inch. 
' 0 - 0210 ^ 
0-0200 
0-0180 
Thicknesses measured < 
► Minimum =0-018 inch. 
0-0200 
0-0194 
0-0188 
0-0192 
^0-0196, 
Collapsing pressure=410 lbs. per square inch 
Experiment 3. 
Globe C. Diameters 4-95 and 4-72 inches. 
In parts of an inch. 
0-0214' 
0-0246 
0-0208 _ 
0-0220 V Minimum =0-022 inch. 
Thicknesses measured 
0-0266 
0-0222 
.0-0226. 
Collapsing pressure =470 lbs. per square inch. 
