l^n.i... V. S. H. F.. IIVJS. (Doc. 1047.) 



EXPERIMEXT 1 



Fig. 5.— Yearling. 132 millimeters. Bonneville hatchery, March 2, 1926. showing well defined winter check. X 25 



Fig. 6.— Yearling. 122 millimeters long, marked at Bonneville hatchery, March 11, 1916. Typical scale showing poorly 

 defined incidental and winter checks. X 25 



Fig. 7.— Marked at Bonneville hatchery during the spring of 1916 as a yearling. Recovered near The Dalles, Oreg., May 

 4, 1920, in its sixth year. Male, 48 pounds in weight. The scale is absorbed to such an extent that the winter band 

 of the fifth year and whatever may have been formed of the sixth year's growth do not show. X 13 



Fig. 8.— Xuclear region of the scale shown in Figure 7. X 25 



Experiment 2 



Fig. 9.— Fingerling, 81 milimeters. Klaskanine hatchery. July 16, 1916. A typical scale with no incidental check. X 25 

 Fig. 10.— Fingerling. 94 millimeters long, marked at Klaskanine hatchery, July 16. 1916, showing incidental check. X 25 

 Fig. 11.— Marked at Klaskanine hatchery during the summer of 1916, when approximately U months old. Recovered 



at Astoria, Oreg., between May 25 and June 21, 1920, in its fifth year. This scale was taken from the skin attached to 



the scar of the dorsal fin, which accounts for its small size. X 13 

 FrG. 12.— Xuclear region of scale shown in Figure 11. X 25 



