8 THE WONDERFUL TROUT 



a certain point, about which we will have 

 more to say further on. 



In early spring it is not always on 

 warm days, with slowly heating water, 

 that the biggest hatch - off of fly - food 

 takes place. Flotillas of March Browns 

 and Early Duns are most often wit- 

 nessed when the air is colder than the 

 water, i.e. if both are above the certain 

 point on the thermometer scale. A bright, 

 warm blink of sun occurring about the time 

 of the hatch-off of fly say 10.30 to 11 or 

 12 noon will certainly assist the hatch-off. 

 Not much before the time when snow-water 

 has cleared away do larvae rise to the surface 

 and become fly-food. 



In the above statements it will be seen we 

 remove some portion of the emphasis which 

 Stewart puts upon the state of the weather (v. 

 p. 122) as the only, or principal, factor in the 

 birth of water-insect life. By long experience 

 we have come to the conclusion that the rising 

 of trout depends less upon the coldness or 

 warmth of the atmosphere separately than 

 upon the comparative temperatures ruling 

 between air and water ; and that if water be 



