242 THE ZOOLOGIST. 



in the form of an eel or coghill net for capturing the fishes after 

 they had passed through the turbines and had reached the tail- 

 race. This net was twelve feet wide, and tapered to a pocket or 

 narrow, kept open by hoops, and fishing into a floating box 

 covered with perforated zinc. The ground-rope of the net was 

 heavily weighted with lead. In all five experiments were per- 

 formed, viz. : (1) at Devil's Mills (Mr. Shackleton's), Lucan ; 

 (2) Messrs. Hill's Mill at the same place ; (3) at the Salmon- 

 Leap (Mr. Wookey's), on the same river; (4 and 5) at Coagh 

 Mills (Messrs. Duff's). 



In the first experiment the turbine was an Alcott, sixty- six 

 inches in diameter, with seventy revolutions, and a fall of seven 

 feet. Ten Smolts were put in the turbine-pit. In ten minutes the 

 net was lifted, and no trace of the fishes observed. Four dead 

 Smolts were then placed in the pit with the turbine in full opera- 

 tion. In ten minutes they floated down the stream and were 

 secured with a landing-net. *' Two were uninjured in appear- 

 ance ; one was broken across the back." Two other dead Smolts 

 (specially marked) were placed in the pit, and they were secured 

 in the tail-race, apparently uninjured. In all probability the ten 

 Smolts placed in the pit by Sir Thomas Brady resisted the 

 efforts of the turbine to engulf them, or, if they passed through, 

 kept to the stream above the net, or passed by the side or 

 beneath. A sickly, dying, or dead fish would soon have appeared 

 in the tail-race or the net. 



In the second experiment a Leffell turbine, of fifty- six 

 inches, with a fall of seven feet, was used. The number of 

 revolutions is not given. Twenty-three Smolts were put in the 

 turbine-pit, and after ten minutes the net was raised. In it 

 were six living Smolts, six dead and two dying ; four " mashed 

 up"; one living Trout of If lb. ; one Eel about | lb. There 

 were no marks of injury in the living, dead, or djang Smolts. 

 Sir Thomas thought the marked Smolts had been subjected to 

 two or three revolutions, while the Trout had been in the tail- 

 race before the net was fixed. He does not express any opinion 

 as to the effects of the turbine on the fishes. 



In the third experiment (at Mr. F. Wookey's mill) a Hercules 

 turbine of twenty-one inches, three hundred and twenty-five 

 revolutions, and a fall of twenty-eight feet was used. The net 



