REPORT ON ARTIFICIAL FISH-CULTURE. 45 



book upon his method of stocking streams, and 

 it seems that a society is about to be formed 

 under the patronage of Sir H. Labouchere, with 

 a view of attempting to stock the Thames with 

 salmon. 



The process employed by Gehin and Remy is 

 simple and easily practised; it hardly differs 

 from that adopted by Boccius, and equally re- 

 sembles the method described by Jacobi, nearly 

 a century ago. 



Trout-breeding takes place in December, and 

 in order to have eggs for artificial hatching, it 

 suffices to press lightly, before and behind, the 

 abdomen of a female fish ready to hatch; and* 

 her eggs, in falling, should be caught in a vessel - 

 with water, and afterwards sprinkled with milt 

 obtained in the same manner and, diluted. . 



If the eggs have" not arrived at their term 

 when operations are commenced, they will only 

 be run out with a strong pressure, 'and in such 

 case the fish should be left in a preserve, during 

 some days before this forced birth is adopted, 

 for neither the eggs nor the milt can be usefully 

 employed in a state of immaturity, and the life 

 of the parent fish would be endangered by rough 

 handling. 



On coming in contact with the spermatised 

 water, the eggs change color — before fecundation- 



