26 TREATMENT OF THE EGGS 



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

 dles, instead of gravel. Tig. 2 represents the 

 hatching apparatus adopted by Mr. Costa. 



Fig. 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. 



