[157] 



POND CULTURE. 



G^2:^ 



Fig.40. 



loll,-, and placed at intervals of 1.75 to 2 meters. To tliese books bait 

 is Ikstened. It may be of any desired length ae(!oidinu- to tlic area of 

 the sheet of water where it is to bo nsod. lly means oi' laroe stones 

 weighing- 15 to 20 pounds each, it is sunk to the l)()ttom close to the 

 shore, and retained there by these stones and by smaller ones, one of 

 which is fastened to the line between every two hooks. This lii'ie is set 

 in tjje evening and lifted from the water in tlie morning by means of a 

 strong iron hook. 



21. The Jish-lrgs should not be very large, but capable of holding 

 about 5 hectoliters of water, so that, according to the temperatnre, they 

 can hold from 200 to 400 pounds of lish. Tlie inside mnst be perfectly 

 smooth, and should not have a bung stoi)per, however short, so that the 

 fish cannot be injured by any uneven places on the inside. At the top 

 these kegs should have in the center a hole large enough to admit the 

 largest fish. The hole should be covered with a perlbrated tin lid or 

 with a lid made of wicker-work. On some farms it is the custom, after 

 the fish have been ]mt in the keg, merely to stop up the hole with a 

 large bunch of straw. The kegs are generall>- of a long shape. Small 

 kegs, flattened at the end, capable of holding about 100 pounds of lish, 

 are more serviceable than round kegs, 

 and are to be specially recommended if 

 fish are to be transported any great dis- 

 tance. In such kegs the tish are not 

 piled u]) one on the top of the other, but 

 can lie comfortably side by side, Such 

 oval kegs generally measure 87.5 centi- 

 meters in length, the same in breadth, 

 and 22 centimeters in height. The bung- 

 hole is very wide, and can be closed with 

 a grate-lid and locked with a i)adlock. 

 To the sides two rings are geneially at- 

 tached, so that two meu can conveniently cairy it. i5ut, as these kegs 

 donotattbrd absolute security for the transjjortation of tendei' kinds 

 of fish— as perch-pike, pike, and trout— to any considerable disianee, 

 even if a piece of ice is thrown into it or fastened to the bung hole in 

 such a manner as to allow the water to drip from it into the keg, sell- 

 acting fish-wagons have been constructed, in which air is iutrod'-.i-ed 



into the water of the kegs by means of a pair of bellows kepi iu tion 



by the action of the wheels. 



For transporting trout by railroad :\Ir, .lean liichard, of Lnimine, in 

 187G constructed an ai)paratus which renews the air of the water •lur- 

 ing transportation in the same manner in which this object is attained 

 iu nature by the rushing of mountain streams over rocks and stones. 

 This ai)paratus consists of a tin box, which is divided in two compart- 

 ments by a i)erforatod piece of tin. lioth compartmenrs are only hall' 

 filled with water. The trout are placed in one, while in the other there 



