Spawning. 41 



of the greatest importance, and should receive 

 further attention, as it leads us to a clearer com- 

 prehension of the manner in which eggs are 

 naturally fertilized in a stream, and cannot fail 

 to be of great interest to the student of 

 physiology. 



We have said that under the old regime sixty 

 per cent, was thought good. By degrees, how- 

 ever, less water was employed, and the result 

 was found to justify the innovation ; so that, 

 gradually one vessel was substituted for two, 

 and very little water was used. The veteran 

 pioneer in pisciculture, Seth Green, found this 

 out many years ago, as Mr. Stone tells us in 

 ' Domesticated Trout ' ; and, though ready to 

 impart any other fact to others, he carefully kept 

 this to himself, saying that it was as good as a 

 patent to him, and so it was. However, before 

 the advent of the Russian method, men on this 

 side of the Atlantic had come to the same con- 

 clusion, and eighty per cent, of impregnation 



