THE WIND 41 



in an east wind the spring or summer 

 temperature of the atmosphere in day- 

 time is almost always higher than that of 

 the water. If, therefore, during these 

 seasons trout wanted to feel the warmth, 

 they would be constantly rising above 

 the surface. 



Other fishermen will offer a solution 

 of the problem apparently more scientific. 

 They will say that the fish as a rule take 

 artificial flies only when there are on 

 the water real insects of which the lures 

 are imitations, and that these insects, 

 which are aquatic, the eggs lying among 

 the sedges, or among the weeds and 

 gravel on the bed of the river or of the 

 lake, are not brought forth until the cold 

 winds have passed. This doctrine is more 

 plausible. It is beyond a doubt that the 

 fish do not as a rule take artificial flies 

 freely until the insects which the lures 

 resemble are fluttering about the water 

 in abundance. There would, for example, 

 be no hope in offering a Mayfly before 

 the natural insect was abroad in its 



