Pig. 4. — Section of Mild Steel Plate, J inch thick, afteu Detonation of 

 Gun-Cotton in Contact with the Side A. Scab Toen off from B. 



FiC4. 5. — Section op Mild Steel Plate, 1^ Inch thick, after 

 Detonation of Gun-Cotton in Contact with the Side A. 

 Crack Formed at a. 



Fig. 



-Axial Sections of Steel Cylinders, after the Detonation of 

 Gun-Cotton in Contact with one End. 



