14 SCIENCE SKETCHES. 



to look, and whether caddis-worms and young 



mosquitoes were really as sweet and tender as he 



used to think they were. Then he thought some 



/ other things ; but as the salmon's mind is located 



I in the optic lobes of his brain, and ours is in a dif- 



\ ferent place, we cannot be quite certain what his 



thoughts really were. 



What our salmon did, we know. He did what 

 every grown salmon in the ocean does when he 

 feels the glacier-water once more upon his gills. 

 He became a changed being. He spurned the 

 blandishment of soft-shelled crabs. The pleasures 

 of the table and of the chase, heretofore his only 

 delights, lost their charms for him. He turned 

 his course straight toward the direction whence 

 the cold water came, and for the rest of his life 

 never tasted a mouthful of food. He moved on 

 toward the river-mouth, at first playfully, as though 

 j he were not really certain whether he meant any- 

 / thing after all. Afterward, when he struck the full 

 current of the Columbia, he plunged straightfor- 

 ward with an unflinching determination that had 

 in it something of the heroic. When he had passed 

 the rough water at the bar, he was not alone. His 

 old neighbors of the Cowlitz, and many more from 

 I the Clackamas and the Spokan and DCS Chutes 

 and Kootanie, a great army of salmon, were 

 with him. In front were thousands pressing on, 

 ' and behind them were thousands more, all moved 

 : by a common impulse which urged them up the 

 ^Columbia. 



They were all swimming bravely along where the 

 current was deepest, when suddenly the foremost 



