144 American Fisheries Society 



to flow through other ponds, making it possible to do something 

 with a pond in a very short time, if necessary. This idea will be worked 

 out in the pond system of the new hatchery. 



What Mr. Buck referred to had to do with the old hatchery, rather 

 than with the plans that we are developing for the new one. 



Mr. Buck: Have you followed your experiment through of holding 

 young bass or trapping them in a V-shaped screen with a small opening 

 between? I tried quite a number of experiments to trap them in that 

 way, and I found they did not pay any particular attention to the fact 

 that the screens were V-shaped. They could as easily go through 

 one way as the other ; they could see that way and would go right 

 through. I did not succeed at all in trapping bass with any such 

 arrangement. 



Professor Dyche : 1 do not see how they can get back. They 

 would swim by. 1 have used the same kind of a device for the trapping 

 of minnows, and it worked successfully. 



Mr. Buck: That is the theory, but they did not do it. They went 

 hack and forth freely. 



Professor Dyche: When the young lish go through the trap gates 

 into the new feeding grounds, they may be shut up there. The trap 

 gates need not be left open except while the fish are going through. 

 The small bass, when they begin to swim about, will go with the water 

 lhat is going out, and every one that comes along apparently goes out. 

 After they get larger and stronger and. say two-and-a-half inches long, 

 they seem more willing and able to go against the current; however, 

 by this time the passage-way may be closed so that they cannot go back 

 to the breeding pond where the old ones are. Such an arrangement, 

 so Far as I have been able to work it out, seems to be a good one. If 

 this system is not altogether satisfactory, the pond system will admit 

 of almost any kind of an arrangement for almost any kind of work 

 that one may want to do. One can connect a number of the ponds or 

 can have them all independent. One can handle the water as one sees 

 lit; the ponds are built small, averaging an acre in size. We will 

 have a hundred ponds, which will give a great deal of perimeter — a 

 vast amount of shallow water, where the proper kind of plants can be 

 grown and where other natural conditions favorable to the fish can be 

 produced. We do not want to interfere with the fish any more than 

 is necessary; we want to let them alone. We, hope to provide condi- 

 tions thai will enci urage the lish to do just what they want to do, to 

 breed and produce their kind. That is the idea of building ponds 

 having considerable perimeter. These ponds are basin-shaped; and 

 when the water is at its normal stage it will be six feet in depth at the 

 deepest places and the places where the ponds are to be drained. 



Mr. < '<. \Y. X. Brown, Homer, Minn.: At the Homer station, the 

 outlet or drain boxes are provided with a cement partition, which 

 affords perfect water control. Suitable openings are provided at a 

 proper height to allow the overflow to pass out when the pond is filled, 



