332 



Popular Science Monthly 



i:t*s^:«tjic^ 



The airman is monarch of all he surveys includmg the enemy submarine submerged thirty 

 to forty feet under the water which is perfectly visible to him. He releases a bomb which 

 is guided in its descent to the water and its speed under the water by the parachute, which 

 is a dislicd circular plate. Two means are used to explode the bomb. Water flowing in 

 through perforations either fires a quantity of sodium which in turn discharges the fulmin- 

 ate, or it completes the circuit of an electrical igniting apparatus setting off the bomb 



