GROWTH OF SALMON AND TEOUT. 79 



For other questions connected with development, other modes of 

 investigation will have to be discovered, and in particular questions of race, 

 and questions dealing with tendency to growth, or a hereditary capacity for 

 growth, will naturally have to be studied in such a manner as to ensure 

 complete control and isolation of every influence. 



In conclusion I may add that there is no doubt that the methods of 

 investigation which have been discussed in this -work will be of general 

 benefit in many directions in experimental and investigation work, 

 inasmuch as they, have enabled us to penetrate into the secrets connected 

 with the growth and the life history of every trout and every salmon more 

 deeply than has ever been done before. 



