CHAPTER IV. 

 HATCHING APPARATUS. 



THE hatching apparatus consists of the supply 

 reservoir, the aqueducts, the filtering arrange- 

 ments, the distributing spout, and the troughs, or 

 hatching apparatus proper. 



The Supply Reservoir. 



The supply reservoir, which hatches the eggs, is the 

 great motive power of the whole establishment. It 

 is this which does the work of replenishing all the 

 other departments of the trout farm. 



On its steady, unfailing supply everything depends. 

 If it should fail from any cause during the hatching 

 season, the whole year's increase would be lost. It 

 follows, then, from the importance of this agency, that 

 it should be most securely guarded. You should, 

 therefore, in enclosing the reservoir, make your work 

 very firm and secure, especially the lowest parts of it, 

 where there is the most danger. Leave nothing to 

 chance in this work. Take no risk whatever, but 

 guard it from the possibility of breaking away ; and 

 in doing so, do not forget that muskrats and frost 

 will have no more consideration for your hatching 

 reservoir — so important to you — than for any other 

 body of water. 



