HAACK RAISING SALMONOIDS IN INCLOSED WATERS. 679 



raised in this establishment, valued at 150,000 francs. This flourishing 

 establishment has unfortunately been totally inundated and partly de- 

 stroyed by the freshets in the Rhine and the 111 during the year 1874. 

 Nearly all the trout were lost, and since that year this establishment has 

 not been in operation. 



Besides the natural food which the 111 supplied in considerable quan- 

 tities, horseflesh was exclusively used for feeding the fish. The horses 

 which were slaughtered were always carefully examined by veterinary 

 surgeons, and the flesh was fed to the fish in accordance with their size; 

 the larger ones got it chopped up in small pieces, and the young fish, 

 ground fine. Two horses were generally used every week. As skin and 

 bones were profitably sold, the horseflesh generally cost the establish- 

 ment 3 to 4 cents per kilogram, and often much less. 



The establishment over which I preside, during the first years was very 

 successful in the raising of trout, and I used horseflesh exclusively for 

 food. It was salted and came packed in barrels from Miilhausen, in Alsace- 

 It was the very best meat, free from sinews and bones, and cost me, in- 

 cluding cost of transportation, 4 to G cents per kilogram. I kept a very 

 careful account of my expenses for food, and found that it cost me from 

 50 cents to 73 cents to raise 1 kilogram of trout. Considering that trout 

 sell at $1.25 to $1.50 per kilogram, my profit was considerable. In this 

 calculation, however, I have taken no account of the natural food which 

 the trout find in the larger ponds containing aquatic plants. By this 

 method of feeding, some trout weighed 2h to 3 pounds when two and a 

 half years old. Unfortunately 1 had to give up this method, as, doubt- 

 less owing to some infected meat, an epidemic broke out among my trout 

 and carried off every one of them. 



There can be no doubt that the epidemic was caused by infected meat, 

 since it broke out on the same day in all my ponds, many of which had 

 no connection whatever with each other. . Not only the larger fish, but 

 also those which were only a few months old, in fact, all my salmonoids, 

 died in one day. 



For several reasons I could not buy the horses alive and have them 

 examined and slaughtered at my establishment, and I was consequently 

 obliged to give up this method of feeding fish. I must say that I have 

 not obtained a similar success with any other food. 



I am told that the establishments at Aubach and Baitzenburg are 

 worked on the same principle, though I do not know with what success. 



In raising saibling in small ponds, the greatest success in. Germany 

 has been obtained by Mr. Wieninger, at Teisendorf, in Upper Bavaria. 

 Here may be seen within a small space many thousands of great and 

 small saibling, all raised from the egg. 



It is truly astonishing that so large a number of fine fish can be raised 

 with so little change of water. I must warmly recommend this estab- 

 lishment to all persons interested in pisciculture. 



The establishment at Hellbrunn, near Salzburg, is also very success- 

 ful in raising saibling. 



