THE BRITISH ANGLER'S LEXICON. 183 



of Caistor ; this latter has been found to be all that is 

 desired. After seven weeks the fry are removed to the 

 rearing ponds and judiciously fed with a properly-mixed 

 insect and animal food until they arrive at the par stage. 

 This year (1890) there have been turned out into the river 

 several hundred thousand healthy fry, and as many retained 

 to be turned out in the spring of 1891." It is easy to hatch 

 perch, and a succesful mode of taking the eggs is mentioned 

 by Levingston Stern in his work " Domesticated Trout": 

 Take a good sized milk pan nearly full of water, having two 

 ripe fish handy. Impregnate the water with the milt, then 

 take in hand the female fish, hold her over the pan of water 

 so as to let the exterior end of the roe rest, as it comes out, 

 on the further edge of the pan ; it will stick at once. Then 

 draw the fish slowly over the pan to the opposite edge, 

 letting the roe fall in the w r ater, and fasten it as before, on 

 the edge of the pan. The roe will thus be suspended in 

 the water in such a way that it cannot get together and 

 stick and suffocate itself, as it would do if it had a 

 chance. Shake the pan a little. In an hour rinse the eggs, 

 change the water twice a day, and in twenty days, if the 

 water is not too cold, the eggs will hatch. Sixty degrees 

 Fahrenheit is a good temperature to hatch them in, but they 

 will stand a temperature as high as eighty-five degrees, and 

 the development becomes very rapid. A singular feature of 

 the embryo is its movement in the egg, which begins as 

 soon as the fish is visible. The little creatures jump from 

 one wall of the egg to the other with quick spasmodic 

 movements. This motion is incessant day and night, and 

 only ceases for a moment when the eggs are shaken. 



Plummets. These are simply leads attached to a 

 line to ascertain the depth of water, and are used by the 



