56 Trout Culture. 



hundred ; a pounder, one thousand ; a two 

 pounder, two thousand, and so on. 



American trout eggs take very nearly, if not 

 quite, the same time, under similar conditions, 

 to hatcl) out as those of this country. Mr. Seth 

 Green, no mean authority, says that in water at 

 50 Fahr., the eggs will hatch in fifty days, and 

 every degree warmer OF colder makes five days 

 difference, the eggs hatching earlier in warmer, 

 and being retarded in their development in 

 colder water. Mr. Green also says that if the 

 eggs hatch in fifty days, the yolk sac lasts thirty ; 

 if hatched in seventy days, the sac remains forty- 

 five. We are indebted to Mr. Stone for this 

 information, which will be found generally 

 reliable, though subject to alteration or modifi- 

 cation by circumstances. 



Seasons vary, and times of spawning vary 

 (though within comparatively narrow limits), 

 consequently no hard and fast rule as to time 

 of incubation can be laid down. Late eggs may 



