[Sf] UTILIZING WATER BY FISH-CULTURE. 1131 



thickness of a small finger ; in the following autumn they reached a 

 length of 50 to 60 centimeters ; and their growth may therefore truly be 

 termed very rapid. According to information furnished by the well- 

 known French fish-culturist, Millet, 1 kilogram of young eels placed in 

 an extensive peat-bog near the river Aisne, in 1840, had increased so rap- 

 idly that five years later 2,500 kilograms of large eels were caught. 

 For stocking small ponds with a sott bottom, marl-pits, and peat-bogs, 

 and also large lakes, the yonng fry of the eel can be highly recom- 

 mended. 



Nets cannot be used for catching eels, because they generally root 

 deep in the ground ; they are, therefore, only discovered after the pond 

 has been laid dry, by drawing a rake through the mud. They are easily 

 caught, however, with fish-pots, purse-nets, and with a hook and line. 



