441 



TYPtCAL PHOTOGRAPHS OF RISING BUBBLES. 



FIG..1 (a.V 

 BUBBLES FROM CORDITe CHARGE & HEWINC1 vyAKES- 

 ( &IDEVIEW ). 



S3CI 



:::;ai 



auBBL^ FROM COROtTE CHARGE ABOUT TO BREAK SURFAQK 



( view from abovs V 



PLATE. I. 



