Inventions the War Has Brought Out 



A Russian portable 

 shield captured dur- 

 ing a retreat and 

 now used by the 

 Germans. This 

 shield is made of 

 bullet-proof steel 

 and is admirably 

 designed to shelter 

 five riflemen who 

 protect their 

 trench- digging com- 

 rades. The shelter 

 may be taken to 

 pieces in a very 

 short time and 

 packed for trans- 

 portation in motor 

 trucks 



Listening to the sound of heavy guns with the 

 aid of a tin-can telephone receiver. A tin can, 

 suspended from a copper wire which is wound 

 about a pencil or penholder pressed against 

 the bone back of the ear, makes an excellent 

 instrument for detecting these sounds when 

 they cannot be heard otherwise 



An ingenious French 

 device for photograph- 

 ing the German posi- 

 tions. A special cam- 

 era is attached to a 

 kite, and when the 

 proper altitude is reach- 

 ed, the photographs 

 are taken automatical- 

 ly. Occasionally the 

 kite is sent up from an 

 automobile, and is 

 towed to the desired 

 locations. One of the 

 interesting phases of 

 the war has been the 

 use of kites, even man- 

 carrying kites, in war 

 observations. A camera 

 can well take the place 

 of the man, especially in 

 a kite. The distance 

 from the ground can be 

 accurately estimated 

 by means of a theodo- 

 lite, the instrument 

 used by surveyors 



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