DR. JORDAN'S OPINION 



DOCTOR DAVID STARR JORDAN, 



of the University of California, recently 

 addressed an informal gathering of scien- 

 tists at La Jolla, California, pointing out 

 certain interesting biological phenomenon in 

 connection with salmon. Science, it seems, 

 does not know where salmon spend their 

 three to five years of life in the ocean. Some 

 of them are supposed to stay fairly near 

 the shores, where they first enter the sea 

 from the river. But no one knows definitely. 

 The doctor propounded a biological 

 puzzle: How do red salmon know which 

 rivers or streams have lakes at their head- 

 waters? It is an established fact that red 

 salmon will not ascend any other kind of 

 stream for spawning, although king salmon 

 and some other varieties will. In this con- 



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