158 THE WONDERFUL TROUT 



In normal seasons the temperature of our 

 west-coast waters is usually warmer than 

 those of our east coast, because westerly 

 winds on-shore winds further influenced 

 by the warm Gulf Stream, bring up the 

 temperatures. 



In normal seasons the temperature of our 

 east - coast waters, reversing the above 

 arrangement, is colder than those of our 

 west -coast waters, because normal winds, 

 being westerly, are off-shore, and, as every 

 one knows, there is no Gulf Stream influence 

 in the North Sea. or very little to speak of. 



An equable temperature is thus kept up 

 by natural causes and effects, and, if modifi- 

 cations do occur, they only act as safety- 

 valves and compensation balances to Nature. 



In normal seasons a very patent modifica- 

 tion may be found in the compensating 

 temperatures of river water. Thus the colder 

 snow-water, descending from the mountainous 

 districts to the east coast, such as the Spey, 

 Dee, Tay, and Tweed, etc., meeting with the 

 colder area of the North Sea, allows a vigorous 

 race of salmon to ascend at an early season 

 of the year, which populate the rivers from 



