30 



they can exercise their choice in tlie matter, for change of 

 environment may involve a change of diet. The horse and 

 dog may take kindly to sweetmeats occasionally, but the 

 (me returns to his oats and the other to its vomit, notwith- 

 standing, and it would be foolish to magnify their vaga- 

 ries into confirmed habits. 



REARING AND DISTRIBUTING TROUT AT THE 



NORTHVILLE STATION. U. S. FISH 



COMMISSION. 



By Frank N. Clark. 



Some six years since the question was brought wp as to 

 the practicability of rearing trout for distribution instead 

 of planting the fry. This subject was suggested by Colonel 

 McDonald. 



As such si:)lendid results had been achieved with plant- 

 ing carp partially grown, it was suggested that better 

 results might be obtained with planting partially-grown 

 trout. The work was inaugurated by the U. S. Fish Com- 

 mission at the Northville station in the winter of 1886-87, 

 and for that season we succeeded in distributing in the 

 following December, January, February and March, some 

 11,000 iish. 



From this beginning the work has been quite successful,' 

 until the season of 1890-91 we have distributed to Dakota, 

 Nebraska, Iowa, Minnesota, AVisconsin, Indiana, Ohio, and 

 Michigan, something over 150,000 yearlings and Unger- 

 lings ; and I conlidently believe, in the near future, that 

 from the North ville station alone we shall reach the 

 1,000,000 mark in our work of rearing and distributing 

 yearlings. 



