[49] FISHERIES OF THE UNITED STATES. 1203 



DEFLECTED CURRENT FISH-WAYS. 



(In which the current is retarded by being made to travel through 

 a distance equal to many times the length of the way in descend- 

 ing, being frequently interrupted by objects placed in the 

 course, causing a change in its direction). 



a. ZIGZAG- CURRENT FISH-WAYS. 



Brewer's single-groove fish-way. 



This fish way consists of a straight chute with a series of equilat- 

 eral triangles extending transversely from either side along 

 the bottom, the spaces between them forming a zigzag chan- 

 nel through which the water passes to the lower level. The 

 angular turns, which change the direction of the current, serve 

 to retard the downward movement of the water. This fish- 

 way evidently works best when there is little more than enough 

 water to fill the groove. Patented April 30, 1872, by James 

 D. Brewer, of Muncy, Pa. Model by James D. Brewer. 15,355. 



Steck's double-groove fish-way. 



This fish-way consists of a straight chute, with irregularly sloping 

 floors, which serve to retard the water in its descent. The 

 floors are so arranged that the main current at the center is 

 repeatedly broken up to form two smaller ones, which, after 

 being deflected toward the sides, are brought together again 

 at a lower point. Patented by Daniel Steck, of Pennsylvania. 

 26,107. 



i. TRANSVERSE-PARTITION FISH-WAYS. 



Steck's fish-way. 



In this fish- way the velocity of the water is retarded by transverse 

 partitions extending alternately from either side four fifths of 

 the distance across the sluice. The descent is made by means 

 of transverse sloping floors. By this arrangement the fish- 

 way is practically cut up into a series of straight open sluices, 

 the upper end of one being on a level with the lower end of 

 • the next preceding one. The length of the fish-way is greatly 

 reduced by the parallel arrangement of the sluices. Designed 

 and patented by Daniel Steck, of Pennsylvania. 26,108. Model 

 by James D. Brewer. 



Smith's incline-plane return fish-way. 



In this fish-way the water is carried through half of the perpendic- 

 ular height in an ordinary sluice or chute, leaving a level floor 

 with steps at regular intervals. In descending through the 

 sluice the water acquires considerable velocity, which is over- 

 come by a series of rectangular compartments, the partitions 



