114 AMERICAN FISH CULTURE. 



of Northern Europe. Although their growth is much 

 more rapid than the latter for the first year in which time 

 they attain the weight of a pound their subsequent in- 

 crease in size is slower. Large salmon of the Danube must 

 therefore be fish of advanced age. 



The first attempt at breeding salmon artificially in the 

 United States, as far as I have been able to ascertain, was 

 by James B. Johnston, Esq., of New York city. Four 

 years since he imported the ova of salmon, salmon of the 

 Danube, trout, and charr. A part of these were hatched 

 out at the studio buildings on Tenth street, New York, in 

 troughs similar to those at the College of France, but the 

 Croton water was fatal to most of them. The fry which 

 Mr. Johnston removed to Long Island were promising in 

 confinement, he says, " but died from preventable causes 

 when liberated." 



Salmon ova which were planted in the Pemigewasset in 

 the fall of 1866, it is thought did well, as Dr. Fletcher, of 

 Concord, N. H., saw the fry last autumn. This gentleman, 

 who had the matter in charge, also brought home from the 

 Mirimichi last fall seventy thousand eggs. Half of these 

 were placed under charge of Mr. J. S. Robinson, of Mere- 

 dith, N. H., and the remaining half were put into the 

 hatching-troughs of Rev. Livingston Stone, of Charles- 

 town, N. H. The first fry hatched in sixty-two days from 

 impregnation. In a letter to Mr. Ainsworth, dated Feb- 

 ruary 6th 1867, Mr. Robinson says : " The hatching of the 

 salmon ova has concluded and the result is very gratifying, 

 as 99 per cent, have hatched and seem to be perfectly 



