150 FISHERMEN'S WEATHER 



slowly when the water strikes colder 

 than the air. 



As regards frost, then, we have seen 

 that it is favourable to grayling fishing, 

 and that, so long as it goes off during 

 the morning, a frost overnight may benefit 

 the salmon and trout fishing next day. 

 In the case of some specified rivers and 

 lakes, however, it seems fatal to sport, 

 and its effect is not the same on all coarse 

 fish, bream preferring warm weather, and 

 barbel being rarely caught in cold. 



II. SNOW 



To some extent, snow is associated with 

 frost, but it may be absent in the hardest 

 frost, and, on the other hand, it may lie 

 along the banks of the river with the 

 temperature either above or below 

 freezing-point. Again, there is a dis- 

 tinct condition, when snow melts into 

 the river, known as "snow-broth," which 

 will be considered separately. In many 

 cases where a fall of snow is not fatal, 



