THE DAY FLYERS 



another flock would come out of the southwest 

 and follow as directly after those which were 

 now several miles ahead, as though there were 

 guideposts in the sky. 



TRAVELING NIGHTHAWKS. 

 They migrate chiefly late in the afternoon and early morning. 



Besides those day travelers which fly near 

 enough to the earth to be seen, there are others 

 which fly too far above us to be within range 

 of our eyes. On September 30, 1894, an astrono- 

 mer at Shere, England, was studying the sun 

 through a telescope. Every few seconds, during 



