CHAPTER Vni 



CONSTRUCTION OF A TROUT-HATCH- 

 ERY 



An appropriate building for the hatching of 

 eggs is necessary unless trout-propagation is 

 to be conducted on such a scale as to be scarcely 

 worthy the name. 



Certain conditions must be observed to in- 

 sure success — conditions as important as the 

 location of the ponds or the character of the 

 water. First and foremost the building must 

 be located in such a manner that water can flow 

 through the supply-trough so as to give a good 

 head and flow freely into all the hatching 

 troughs, and also so that there will be perfect 

 drainage from the hatchery into the sewer or 

 the ponds outside. It must not be so far away 

 from the spring as to allow much change in 

 the temperature of the water> or if it must be 



very far from the source of supply then the 



m 



