Popular Science Monf/ih/ 



I Kadol anil Ili'rbirt 



Army reconnaissance observers study enemy airdromes, make a note of the number of han- 

 gars and planes on the ground and watch the movements in towns and large encampments 



broken by shell fire he sees smudges and 

 spots, all of which are faithfully recorded. 



Camouflage or a Battery — Which? 



The shells come thick and fast, but the 

 pilot is an old hand at the game; he'll 

 stick till the work is done. Cleverly 

 hidden on the ground, the observer sees 

 some small narrow-gage tracks, terminat- 



ing in several pits. Has he discovered a 

 new enemy battery, or is it camouflage? 

 He must see the gun flashes before being 

 sure. There they are! One! Two! 

 Three! P'our! Five! He also sees the 

 blast marks in front of the battery. Now 

 he is satisfied. Signalling the pilot he 

 focusses his glasses again^ this time in the 

 direction of home. 



