198 



THE ROYAL SOCIETY OF CANADA 



so 



6 JO 9.Q f.û 



Fig. 15. — Coho. 3rd year growth. 



A comparison of the 1916 coho with those obtained in 1915, 

 brings out some points of interest. The average growth for the first 

 year is slightly higher for 1916, 3-6 as compared with Z-Z. The 

 second year growth, 11-0 inches, is exactly the same as the average 

 for the whole lot in 1915, but slightly greater than the average when 

 those from Neah bay are excluded (10-8). It is in the third year only 

 that there is a very noticeable difference. The average third year 



