REPORT ON ARTIFICIAL FISH-CULTURE. 45 



book upon his metliod of stocking streams, and 

 it seems that a society is about to be formed 

 imder the patronage of Sir H. Labouchere, witli 

 a view of attempting to stock the Thames witli 

 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 bv Jacobi, nearlv 

 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 readv 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 dil'uted. 



If the eggs have not arrived at their term 

 when operations are commenced, they will only 

 be run out with a strong jDressure, and in sucli 

 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 immaturit}*, and the life 

 of the parent fish would be endangered by rougli 

 handling. 



On coming in contact with the spermatised 

 water, the eggs change color — before fecundation 



