444 SALMON AND TROUT. 
THE HATCHERY. 
Livingston Stone, in his excellent work, ‘ Doraesticated 
Trout,’ observes ‘that the time has come when trout can be 
hatched, reared, and brought to maturity in great numbers, 
and with comparatively little loss... . The peculiar nature 
of the things you deal with, however, namely, fish and running 
water—and the magnitude of the numbers you operate with, 
are such that there is hardly an occupation in the world where 
a want of security is followed by such wholesale loss.’ 
The word ‘security’ in trout raising implies a great deal 
more than most people imagine. It means not only that all 
joints and screens in the hatchery and in the ponds are perfect, 
but that the supply of water must be ‘secure’ against falling 
short, secure against violent and excessive flushings, against 
becoming fouled, heated, or frozen; and all this requires an 
amount of foresight and tenacity of purpose, constant vigilance 
and caution, that very few men will undertake to exercise and 
persevere in throughout the whole season, and year after year ; 
but this makes all the difference between successful and un- 
successful trout-breeding. 
Security does not cease to be a szme gud non as soon as the 
hatching season is over; during the whole of a trout’s life- 
time it has to be protected from innumerable enemies, and 
secured in many ways, to be of any ultimate’ value to the 
o1iginal owner. 
In the limited space at my disposal I cannot, of course, 
enter into every little detail, and explain all the different 
sources of danger incidental to trout-breeding. A volume 
could easily be filled in treating of every separate stage in the 
life of a fish; therefore a good deal of condensation is un- 
avoidable. 
Assuming, then, that the supply of water for hatching 
purposes is of a suitable temperature, ample, fairly pure, and 
free from much sediment, it now remains to consider the 
