24 TREATMENT OF THE EGGS 



The hatching boxes should be grated on that 

 side from which the water escapes, with wire 

 cloth, the meshes of which should be sufficiently 

 fine to prevent the eggs, or the young fish, when 

 they make their appearance, from passing out. 



A very neat and convenient hatching apparatus 

 is the flat wicker basket, the interstices of which 

 are fine enough to prevent the eggs from passing 

 through; these baskets are to be placed in run- 

 ning water. Care, however, must be taken, as well 

 as with all other apparatus for the same purpose, 

 that a place be selected where the current of the 

 water is not so rapid as to wash or pile the eggs 

 up in the end opposite to where the water enters. 

 Whenever the baskets become foul, by sediment 

 or vegetable matter, the eggs can be transferred 

 to a clean one, and the basket cleansed. 



A conduit, or flume, must be constructed, of 

 plank or boards, to contain a sufficient depth of 

 water, in which the baskets are to be placed. 

 The utmost cleanliness is absolutely necessary, 

 during the whole time of incubation; it is one of 

 the essentials to insure success. 



The method adopted by Gehen & Remy was, 

 to place the eggs in zinc boxes, of about one foot 

 diameter, with a lid or cover on them, and the 

 sides of each box were pierced full of small holes, 

 care being taken to have the edges of the holes 



