io8 How to obtain it. 



In the case of a lake or river in which it is intended to keep 

 up the stock of trout by a periodical planting of fry, it is of 

 importance to have nurseries prepared for them, and these require 

 to be properly made, or they may be worse than useless. Their 

 construction is often a very easy matter. A series of long narrow 

 ponds of the simplest description will do, and a couple of good 

 men should make enough of these in a few days to stock a lake 

 of twenty or thirty acres. In the case of large lakes it is desirable 

 to have a larger series of these nurseries, and sometimes, in that 

 of more extensive waters, it is an advantage to have them at 

 several places. Once made they require little work to keep them 

 up, and can be used year after year with excellent results. Some 

 lakes are fed by streams flowing a considerable distance through 

 flat marshes or meadows. In such a case it is desirable to go 

 further away, until. a place is reached where the water has a slight 

 fall. It matters little about distances-it may be a hundred yards, 

 or it may be half-a-mile. In the latter case the little fish will 

 easily find their way down stream. When the sight has been 

 chosen, make a long raceway or aqueduct with alternate stretches 

 of deep and shallow water. It does not matter about the wide 

 and narrow stretches being symmetrical at all ; they will have to 

 be made to suit the level of the ground and surrounding 

 circumstances. It may be necessary to have them longer or 

 shorter, but where practicable, from forty to sixty feet will be 

 found a convenient length for the wider and deeper parts, and if 

 carried out somewhat according to the accompanying plan the 

 raceways will be a little longer of the two. 



Let AA represent the stream supplying the pond E. At the 

 point B cut a raceway eighteen inches wide and a foot deep. Dig 

 out some ponds CCC two and a half feet deep by three and a 

 half feet wide, and connect them by raceways DD, of the same 

 width and depth as B. Where' sufficient fall can be obtained, 

 each of these ponds or nurseries should have a bottom outlet at 

 the most convenient point, so that they can be run dry at any 

 time if desired. A four-inch pipe answers best for this. A 

 screen should be placed at the point B to prevent larger fish 

 coming down and another between D and E, which will allow 

 fry to pass down into the lake E, but will prevent larger fish 



