28 DOMESTICATED TROUT. 



In the spawning season, a layer of coarse clean 

 gravel, three or four inches deep, should be thrown 

 into these beds. They should be closely covered, and 

 generally your whole force of water turned on. 



The trout will come up here to spawn in preference 

 to any other place in the pond, and it is here that 

 they are trapped for the purpose of expressing their 

 eggs. 



The continued daily disturbing of them for this pur- 

 pose will sometimes — and usually, I think — drive 

 them down the stream a little lower, towards the end 

 of the season. 



It is therefore a good plan to cover and prepare only 

 the upper half of the beds at first, and to trap the fish 

 there at the beginning of the season, so that when they 

 fall back, on account of being disturbed, they will not 

 drop far enough down the stream to spawn below the 

 lower beds, which, when the proper time comes, can be 

 made ready and covered like the rest. 



We have thus far treated wholly of the artificial 

 method of taking the eggs. This method has two ob- 

 jections. It is entirely artificial, and it involves severe 

 work, and exposure to water in the spawning season. 



To obviate these two objections, Hon. Stephen H. 

 Ainsworth conceived the very ingenious plan of mak- 

 ing the fish spawn naturally, and at the same time of 

 saving the eggs. This idea he carried out in what is 

 now everywhere known as the Ainsworth Spawning 

 Races. 



The following description of this invention is by 

 the inventor, Mr. Ainsworth. 



