CONTENTS. 
Page. 
Established facts and unsolved problems 131 
Principle and method of experiment 133 
Marking tags and tools 134 
Conditions and details of process 134 
Discussion of technique 136 
Little injury to fish in handling 137 
Effects of marking on migration 138 
Detailed results of experiment 139 
Careers of individual salmon retaken 142 
Chinook salmon 142 
Silver salmon 143 
Steelheads 144 
Migration speed 145 
Summary of conclusions 148 
130 
