SALMONOIDS AND TURBINES. 259 



net could not have been adjusted ; moreover, Mr. Shackleton 

 was thus enabled to enter the tail-race from the rear, a distance 

 of about eighty yards. A lining of fine gauze was placed in 

 the bag or pocket of the net. 



(XVIIL) At 2.53 p.m. fifty small Trout, 4-5|- in. long, two 

 Parr, and two larger Trout (9 in.), were placed by means of the 

 wooden shoot close to the turbine, and thrust out by means of 

 the brush covered with cloth, which was left so as to block the 

 return of the fishes. At 2.40 p.m. the net was reached from the 

 rear. The strength of the current had entangled the bag of the 

 net, and carried the end under the leaden weights in front, and 

 the force used in extricating the net apparently had caused the 

 death of a large Trout, which had no external signs of injury. 

 A living Trout, (small) was also in the net, but the condition of 

 the net was such that it was difficult for any Trout to enter, 

 since it formed a loop on itself. The end of the net had not 

 been fixed by the cord. In all these experiments also it has to 

 be borne in mind that, while a dead fish might be held by the 

 meshes, they permitted the egress of small active Trout. 



(XIX.) At 3.25 p.m. one hundred Carp of an average length 

 of 5 in. were pushed down the wooden shoot close to the openings 

 of the turbine. The conditions and the number of revolutions 

 were the same as in the previous experiment. At 4.5 p.m. the 

 net was taken up with the following fishes, all of which were un- 

 injured : fifty-six Carp, three small Trout, which had passed 

 the turbine either now or during the former experiment, viz. one 

 Lochleven, one Eainbow, and one Brook Trout. Two of the 

 living Carp were left in the net. 



(XX.) The next and last experiment took place at 4.38 p.m., 

 when the following fishes were pushed through the wooden shoot 

 close to the apertures of the turbine : Fifteen small Trout 

 (mixed), fifteen small Trout (mixed) used formerly in the Anna 

 Liffey Mills, five Kainbow Trout 9 in. long, one Parr 6 in. in 

 length which already had been twice through turbines. The 

 turbine made about sixty revolutions per minute. At the end 

 of half an hour there were in the net : Two Carp, formerly left 

 in it ; one Parr, 6 in. long, which thus for the third time passed 

 through turbines ; nine small Trout, consisting of Lochleven, 

 Rainbow, and S.funtinalis. All were in perfect condition. On 



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