BEST FOOD FOR YOUNG AND LARGER SALMONOIDS. 781 



Mr. Biiissow recommeuded sheep's liver ground through a fine sieve 

 and mixed with water. 



Mr. Schuster remarked that, with the exception of the ground meat, 

 he had tried all the articles of food which had been mentioned, and 

 many more besides such as dried ants' eggs ground fine, worms, &c. ; but 

 nothing seemed to give entire satisfaction. As a very suitable food he 

 Avould recommend calf or sheep's brain ground through a fine-wire sieve. 

 It swims on the water for a long time and looks as if it was alive. It 

 was moreover particularly good for the fish on account of the great 

 quantity of phosphoric acid which it contained. For large fish this kind 

 of food, however, would be too expensive; these he fed with lungs, milt, 

 salt meat, salt fish, »S:c., also occasionally with boiled meat. With re- 

 gard to salting, Mr. Schuster has had the same experience as Mr. 

 Haack. The fish like salt meat, as he found out accidentally when he 

 received some fish for food which were almost spoiled so that they had 

 to be salted. Afterward they were soaked in water, but did not lose 

 their salty fiavor entirely; the fish, however, ate them readily. 



Mr. von dem Borne feeds lungs slightly boiled in salt water. 



On motion of Mr. Eckardt, it was unanimously resolved to hold an- 

 nual meetings of pisciculturists, since this present meeting had been 

 accompanied by such satisfactory results, and the wish was expressed 

 that these meetings should not always be held in Berlin. 



Mr. Brilssow reported on his artificial raising of crawfish. He uses a 

 basin having wooden walls 44 feet long, 20 feet broad, having a depth 

 of water of 4 feet. At the bottom there is on all four sides a layer of 

 bricks, laid fiat, and on this there are 45 layers of drain pipes cut in 

 halves right across. One hole of these pipes is closed by the wall of the 

 basin, but the other is open, so that the crawfish can crawl in. This 

 seems to have been a very happy idea, for the pipes are all inhabited, 

 and the crawfish only leave them to get their food or when the water 

 of the basin is let oft". The large crawfish were fed with fresh meat, 

 fresh fish, and carrots, and the small ones with carrots cut in cubes. 



He commenced his experiments last spring; 1,400 female crawfish 

 with eggs were placed in the basin, and produced about 20,000 young 

 ones. Generally each female produces 70-80 young ones, but these 

 crawfish had suffered a little from the long journey, and were therefore 

 not quite soiprolific. In the beginning the 3'ouug crawfish were about 

 the size of a fly; in July they were placed in another basin, having a 

 water depth of 4 feet and full of fagots and aquatic plants. At the 

 end of October the crawfish were as large as a good-sized Italian bee, 

 and resembled this insect somewhat by the manner in which the back 

 part of the body was marked, only that they had black stripes on a 

 gray background. The water does not flow into this basin very freely, 

 so that it is only renewed every three days. 



Last autumn Sir. Brilssow' put GOO male crawfish to the females, and 

 these must have copulated with them, as the females have now eggs 



