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ropiiJar Science Monihly 



Before the war, only two or three machines in an endurance contest, in which perhaps 

 twenty aeroplanes were entered, reached their dcstin.ition. But now we hear ot 

 flocks of fifteen flying from Calais to K.irlsriilie on a lionib-droppinR expedition and 

 returning safely. Surely tlie war has taught ui much about flying macliinc construction 



