26 TREATMENT OF THE EGGS 



In this case, the eggs are placed on willow hur- 

 dles, instead of gravel. Fig. 2 represents the 

 hatching apparatus adopted by Mr. Costa. 



Fro. 2. ' 



M. COSTA'S HATCHING APPARATUS. 



A, parallel boxes, in which are placed the willow hurdles, and 

 upon which latter the eggs are placed. B, stop-cock, from which 

 water is supplied. 



Another, and yet more simple plan is shown 

 by Fig. 3. This apparatus may be set up in one's 

 house; the water being supplied to the reservoir 

 B from time to time. A cask, or barrel, or any- 

 thing which will answer the purpose of a reser- 

 voir. The box in which the eggs are placed is 

 represented at A. The waste water flows into a 

 tub or bucket C. 



