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other thing. Careful breeding and hatching will produce 
trout which are just as likely to live, in my opinion, as the 
same number of lambs or chickens; and if the young fry 
die it is not because of any mysterious, innate cause pe- 
culiar to them because they are trout, but it is because 
they were killed, deliberately killed, by external causes, 
just as much as lambs or chickens are killed by storms, or by 
parasites, or from starvation or poison. Itis true that they 
are killed from ignorance of their wants,and not from wilful 
neglect, but it is the same thing abstractly—the cause of 
death is external and removable, and not innate and neces- 
sary. Their wants are peculiar, of course, and more occult 
and intangible than those of pigs and colts, and to a be- 
ginner it will sometimes seem asif they died without being 
diseased. But if they were as large as pigs and colts and 
could be studied as easily, I do not think their wants 
would be found to be any more mysterious or peculiar: 
and if the cause of disease could be magnified, so as to be 
observed and studied clearly, I think that no more trout 
would die when nothing was the matter with them. 
*T am further convinced that study and experience will 
eventually clear this subject, notwithstanding the difficul- 
ties which surround it, and that at some time it will be 
known how to raise trout and make them live, as well as 
is known how to raise turkeysand chickens. I believe that 
there are energy and intelligence enough now interested 
in the cause to accomplish this end. I take this ground, 
partly because any other is unphilosophical and uncom- 
plimentary to the intelligence of those who are studying 
the art, and partly because the facts of experience con- 
firm it.”’ 
On page 149 of the ‘‘ History of Howietoun,”’ Sir James 
Maitland, speaking of a loss of 20 per cent. in a particular 
lot of S. levenensis, says: ‘‘This is a very heavy per- 
centage, and is probably 8 per cent. too high,’’ and in an- 
other place he gives his losses as 11 per cent. and 13 per 
