100 THE NEW ART OF BREEDING FISH. 



reproduction of salmon, the means they have suc- 

 cessfully used to rear trout, we shall be enabled 

 largely to increase the interests of our river-fisheries. 

 I have the honor, &c., 



Milne-Edwards. 



Beport on the means of stocking all the streams of 

 France with fish, addressed to the Minister of the 

 Interior, of Agriculture and of Commerce. 



Paius, July 12, 1852. 



Sir : — In your letter of the 30th June, you ask 

 me to visit the fish-breeding establishment at Mul- 

 house, of Messrs. Berthol & Detzem, engineers of the 

 Khone and Rhine Canal, and to suggest to you mea- 

 sures so that their works can be made to stock all the 

 streams of France. Accordingly, I now put you in 

 possession of the result of this mission. 



The discovery of artificial fish-breeding, was long 

 hidden in the laboratories of science, where it re- 

 mained confined to physiological experiment ; but 

 lately it has been practically set forth by the Count 

 de Groldstein, by Boccius, and above aU, by the two 

 fishermen of Bresse, and sober inquiry and trial have 

 been adopted to attain to the precision of pure method 

 in regard to it. 



I have shown, for my part, with the assistance 

 of Messrs. Berthol & Detzem, that not only the eggs 

 of fish, brought from very distant waters, preserve 



