33 Addenda. 



The water in hatching troughs there, up to Jan. I, 1900, 

 has varied from 38 to 36 Fahr., more often at the 

 lower figure. 



GRAYLING. 



Since the book was in type I have had further ex- 

 perience with the grayling. The eggs came from Mon- 

 tana to northern Wisconsin in May, 1899, m ver Y bad 

 shape. Of the few hatched a very small number lived 

 to take food, and of these 80 per cent, died before the 

 close of the year. Mr. S. P. Wires, Superintendent of 

 the U. S. F. C. Station at Duluth, Minn., has no liking 

 for the fish, if he is expected to feed and raise it. Mr. 

 Frank N. Clark, of the Michigan stations, is of the 

 same opinion. They find the eggs hatch well enough, 

 but beef liver is not the food for them, and the best 

 thing to do is to turn them out when they begin to 

 take food, and this is my more mature view of the fish. 

 My first experience was somehow more fortunate than 

 that of later years. All agree that the adult fish does 

 not mature its eggs in confinement. 



