24 FISH HATCHING. 



and the same time, but at intervals. During 

 these intervals she drops back into the pool, 

 and recruits her strength for further opera- 

 tions. 



From this simple fact we may learn much 

 as regards the increase of salmon by natural 

 means.* To use the words of that practical 

 man, Mr. Ash worth, in a letter to myself, 

 " We find, and I have seen it, that the smallest 

 streams of pure water are the safest, the 

 most productive, and the very places selected 

 by the parent fish for depositing their ova ; 

 and if protected for two months in the winter 



* And this is the meaning of the salmon making such 

 vigorous efforts to get up from the sea to the higher waters. 

 Instinct seems to tell them that the young will die in deep 

 water; they therefore make superpiscine efforts to get up 

 cataracts and waterfalls, and attain the shallow brooks. Give 

 them free passage up, and protect them when there, and they 

 will increase and multiply exceedingly. 



