*3 



These experiments have been conducted with 

 great care, and seem to form the basis of an 

 irrefragable argument that the young of any kind 

 of fish cannot survive the vicissitudes of climate if 

 means are used to hasten their incubation, so that 

 they shall hatch out more than about three weeks 

 before the balmy breezes from the south cause the 

 animalculae, which constitute the natural food of the 

 young fish, to accumulate in the waters in sufficient 

 quantity and proper quality for their sustenance. 



The development of the animalculae, their exist- 

 ence and growth, imperceptible though they be to 

 the naked eye, are no less a product of the light and 

 warmth of the spring sun, than is that of the vege- 

 tation — the grass that comes upon our fields for the 

 sustenance of our Hocks. 



With these considerations in view, is it not 

 obviously as true that other varieties of the salmon- 

 oid family, indeed all fish as well as the white fish, 

 must meet the same fate of starvation and death 

 where means are used to develop them into life out 

 of their natural season, or at a time when the waters 

 of this latitude are so ice-bound that not a particle 

 of animal life can exist for their sustenance. 



I wish to inquire of the practical pisciculturist, 

 what reason he has to suppose that salmon ova, 

 taken from the McCloud river in California, the 

 temperature of which is repotted to be 50 Fah., 

 and their eggs being subject to the vicisitudes of 

 climate during their transportation, after arrival 

 here, which is about the middle of October — and 



