REPORT ON ARTIFICIAL FISH CULTURE. 59 



To this should be added a little house to 

 protect the workmen, where a workshop of all 

 the necessary implements would be, and also a 

 register of the results of each day's observations. 

 The natural history of fish so obtained, would 

 offer invaluable details. When this establishment 

 would be ready, the problem would be reduced, 

 simply procuring eggs sufficient to fill it, and 

 then stocking all the streams of France. This 

 would not be difficult to realize. 



Being on the frontiers of Germany, Messrs. 

 Berthol & Detzen are in communication with the 

 fishermen of the river and great lakes, where are 

 fish, the most esteemed. 



These fishermen have undertaken to give them 

 all kinds of eggs. Messrs. Berthol & Detzem have 

 already taken from Lake Federsee thirty-six gigan- 

 tic fish, which so transferred I have seen in their 

 basins. They are waiting now for a supply of 

 young fish of this kind which bear the journey 

 so easily, that I obtained three for the College 

 of France, by simply putting them under the 

 care of the conductor of the dilligence, who kept 

 them two days and a night in a vase. These fish 

 hatch even in turf pits ; so that they can be easily 

 propagated in those of Piccardy, and in the least 

 favorable waters. Their importation, then, will be 

 a service rendered in fish-breeding. 



