192 DOMESTICATED TROUT. 



or Mr. Furman's on Long Island, can doubt that 

 others can raise them in other places and make them 

 live. 



The beginner may accept these axioms in raising 

 trout : — 



1 . No trout dies without a cause. 



2. The causes of death are discoverable. 



3. They can, in most instances, be removed. 



My own experience has invariably been to confirm 

 these principles. I lost in my apprenticeship days as 

 many young fry as any one else ; but with every death, 

 say over five per cent, there appeared a distinct assign- 

 able cause, present or remote, which could be re- 

 moved or avoided next time ; and the more I lost 

 the more I became satisfied that the causes of 

 death among the young fry could be discovered and 

 avoided. 



My later experience has added confirmation to this 

 opinion. And now, since I have used charcoal troughs 

 and tanks altogether, deaths among the young trout 

 have been, among some lots, rare occurrences, and in 

 general have been no more frequent — over the five 

 per cent weak ones — than among the yearlings and 

 breeders. 



In one charcoal trough, in particular, containing 

 over five thousand, there was, in the season of 1870, 

 less than one per cent of deaths from all causes in 

 three months. It has been the same this year (1871). 

 In one box of a thousand I have not taken put ten 

 dead ones in three months. I attribute this in a great 

 degree to the use of charcoal in hatching, but it con- 



