406 ANNUAL KECORD OF SCIENCE AND INDUSTRY. 



lighter. The food supplied to these fish consisted, in addi- 

 tion to the natural vegetation of the pond, of the refuse of 

 rice and other substances thrown into the pond by the na- 

 tives. 12 A, Decembe?' 9, 107. 



UTILIZATION OF WARMED WATERS IN FISH-CULTURE. 



An important suggestion has been made in regard to 

 the utilization of certain waters in the cultivation of fish, 

 hitherto supposed to be unavailable. The author refers to 

 certain ponds along the Rhine, connected with a variety of 

 manufacturing establishments, which are intended to receive 

 the water condensed by steam-engines. One of these ponds 

 is about one hundred and twenty feet in length, with a depth 

 at the sides of four feet, running down to sixteen feet in the 

 centre, and is supplemented by the dike whicli runs around 

 three sides of the manufacturing establishment. This dike 

 in the aggregate is about 1600 feet long by twelve feet 

 wide, and is six feet deep in the middle. The entire water 

 area is about 24,000 feet, with a depth of six feet in the dike 

 and sixteen feet in the centre of the pond. The dike and 

 pond are simply excavated out of the earth, and are neither 

 bricked nor cemented. They were simply made to carry 

 away surplus condensed water, which runs into the pond at 

 about 110*^ Fahr. The temperature of tlie pond just where 

 the water runs in is about 90, and in the coolest part 76 

 Fahr. Three hundred carp about five inches in lengtli were 

 introduced seven years ago, and now the young can be seen 

 all the year round. Fish weighing four to five pounds are 

 quite common, and one hundred pounds may easily be taken 

 in an hour. Gold-fish also thrive excellently in the same 

 water. It appears that the fish like best to be where the water 

 is warmest, especially the younger ones. The locality referred 

 to is near Bonn, on the Rhine. 2 A,A2)rU 5, 271. 



SHAD IX THE MISSISSIPPI. 



Ex-Governor Hebert, of Louisiana, announces in the papers 

 of his state the receipt, in the month of March, 1876, of a fine 

 specimen of the true shad, ^vhich w^as caught in a dip-net near 

 his house. This, it may be presumed, is one of the many that 

 have been planted in the Mississippi by the United States 

 Fish Commission. 



