196 WINTER ANGLING 



fry placed in an ordinary microscopical tank and 

 viewed with medium powers. 



Hitherto the care of the tyro has been directed 

 to the supply and temperature of the water ; now, 

 however, these cares increase in gravity and num- 

 ber. The water supply must on no account fail, 

 and it should be more plentiful than before. The 

 zinc guard to the outlet must be seen to, so that 

 none of the little fish can struggle against it and 

 get stuck there, which would be the case if it were 

 placed too near the aperture. My plan is to bend 

 the zinc netting into a square form, and place two 

 pieces of wood, like rafters, as it were, between 

 the two sides of the trough to keep it close. No 

 accident will then ensue, because the draught of 

 water is not sufficient to overcome the natural 

 vigor of the fish. The filters must be changed 

 and cleansed often. The same materials will do 

 again and again ; and as soon as it is judged that 

 all the eggs have hatched, the feather must be 

 used gently to agitate the water, so that the egg- 

 shells may be taken out by means of a little fine 

 muslin net, which can be easily made. Perfect 

 cleanliness is your most important consideration, 

 or there is a strong probability of a fungoid 



