INTRODUCTION. 1 7 



where loth spring and safe brook water are at one's 

 command, and either or both can be employed at 

 pleasure.* The brook-water can then be used, if de- 

 sired, while it is safe, and a mixture of spring and 

 brook can be so graduated as to make the eggs hatch 

 at any desired time between the minimum and maxi- 

 mum periods of incubation. In the long run, however, 

 I think experience will prove that a large spring 

 of even temperature and even flow is about as good 

 as anything for hatching the eggs. 



* This is the case at the Mirimichi Salmon-Breeding Works. 



