PopuUir Science Mout/ili/ 



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The McCombie depth-bomb is fired from 

 a gun like a shell. It has a special ad- 

 vantage insofar as it may be thrown 

 within harbors or other protected areas 



leased a depth bomb, though not 

 halting his. speed in the least. 



In a moment a great concussion 

 shook the water roundabout, and to the 

 rear of the Fontting a huge column of 

 water rose- high in the air, oil and 

 bubbles following. The powerful ex- 

 plosive, three hundred pounds in weight, 

 and in a steel case, had sunk with a 

 little splash into the destroyer's wake, 

 bringing its message of death and 

 destruction to the shark-like craft. 



Meanwhile the 

 Nicholson had ar- 

 rived on the scene, 

 and it too dropped a 

 depth-bomb. Then 

 both boats began cir- 

 cling the area wait- 

 ing developments. 



Inside three min- 

 utes developments 

 came. With a splash 

 of water the sub- 

 marine suddenly ap- 

 peared on the sur- 

 face, like a great 

 whale coming up to 

 breathe. It behaved 

 erratically; was evi- 

 dently unmanage- 

 able. The Fanning 

 again bore down, fir- 

 ing from the bow 

 gun. The XichoJson 

 also closed in. But 



only a few shots were necessary. Out 

 piled the entire German crew, holding up 

 their hands in token of surrender. Before 

 they could all be transferred the U-boat 

 sank from under them, never to return. 

 Some of the American crew jumped into 

 the water in an attempt to save stragglers. 



tjectinq powder 



-BOMB CASE 



It later serves 

 as the float 



at water j- 



i"urface 



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Upon the McCom- 

 bie bomb's alight- 

 ing in the water, a 

 water-ignited fuse 

 sets off ejecting 

 powder. Thereupon 

 bomb separates into 

 three parts, a float, 

 the bomb, and outer 

 shell-case itself 



At center of page is 

 bomb before sepa- 

 rating into its three 

 parts. Parts after 

 separation are at 

 left. Entangle- 

 ments catch on pass- 

 ing ship, draw bomb 

 against its side, pro- 

 jecting glass tubes 

 containing fuse- 

 mechanism break, 

 and bomb explodes 



One drowned however, in spite of these 

 efforts. Another later died. Four offi- 

 cers were captured, and thirty-five mem- 

 bers of the crew. The submarine was 

 among the largest in the Germany navy. 

 This is one case of effective work on the 

 part of depth-bombs, and of American sea 

 strategy. It is typical. 



Depth-Bombs Are of Many Kinds 



What are depth-bombs? Trinitrotoluol 

 or other high explosive in a container. 

 Detonated under water, they cause a 



