•246 THE ZOOLOGIST. 



turbine and the tank nearly emptied, only seven inches of water 

 remaining on the bottom, and this was full of fragments of 

 sticks, grass, leaves, and plants of various kinds. Dr. H, M. 

 Kyle, of the Gatty Marine Laboratory, and Mr. Lumsdeu, 

 Superintendent of the Tay Fisheries, carefully searched the 

 turbine-pit with hand-nets, and secured seven small Lochleven 

 Trout (of the fifty), and eight of the larger Trout captured by 

 Mr. Lumsden in the Tay. The largest fish — a Salmon-Trout of 

 3 lb. — was not in the tank, so that it must either have been in 

 the turbine, which the men did not think probable, or it had 

 escaped observaiion. If it had been killed its dead body, either 

 entire or otherwise, could not have escaped observation in the 

 clear water of the tail-race. The two gentlemen above mentioned 

 also waded up the tail-race, but caught no Trout, though a few 

 swiftly darted down stream. 



The two nets were now examined. No fishes occurred in the 

 pollan-net, the small and nimble Lochleven Trout having passed 

 through its meshes. Seven Lochleven Trout (of the fifty) were 

 captured in the sand eel-net. The rest had evidently escaped at 

 the edges or underneath it, for many passed down stream, and it 

 was diflicult to retain such active forms. No trace of an injured 

 or sickly example was seen. 



During this experiment some of the small Trout were noticed 

 near the fry-guard put over the 2 in. guard of iron bars of the 

 head-race, showing that they can get out of the turbine-pit when 

 they please. Indeed, at a subsequent experiment one came out- 

 side the iron bars (the fry-guard having been removed), but 

 darted inward again as soon as it noticed a figure at the edge of 

 the stream. The men stated that the Trout often get out of the 

 pit in this way when it is full of water, and the fall from the 

 stream is slight. On the other hand, Kelts of 24 in., as they 

 descend, may, if the bars are too wide, get into the turbine-pit, 

 and the sickly ones are occasionally killed. 



(III.) As the works also possessed a powerful breast-wheel, 

 8 ft. in breadth at the edge, in two sections, and with " buckets" 

 13 in. across, it was thought desirable likewise to investigate its 

 action in connection with the Smolts. Moreover, connected 

 with it was a regulator (said to be a somewhat rare appendage 

 to a water-wheel), which manipulated a sluice, opening or closing 



