HATCHING APPARATUS. 6/ 



placed about an eighth of an inch lower than the rest. 

 In this depression the eggs lie until hatched, when the 

 young fish fall into the box or trough below. The ad- 

 vantage of this class of grilles over the last form is 

 that they are cheaper. Another advantage is that 

 they can be used in water where too much sediment 

 would collect on tight grilles or in troughs, the sedi- 

 ment being easily w^ashed off the eggs on the strips, 

 and sinking down through the apertures out of the 

 way. 



