1202 FISHERIES OF THE UNITED STATES. [48] 



Swazey's oblique fish-way — Continued. 



the partition and the side of the chute and turned backward 

 in its course. By this arrangement the velocity of the current 

 is greatly reduced. Scale : One fourth of an inch to the 

 foot (~). Invented by Alfred Swazey, of Bucksport, Me., in 

 1874. 29,289. Model by C. G. Atkins. 



SWAZEY'S OBLIQUE FISH-WAY. 



New style. Model of an inclined-plane fish-way in which the par- 

 titions, which extend entirely across to the chute at right 

 angles to it, are placed at an angle with the perpendicular, 

 thus forming a pocket or pool which retards the velocity of 

 the current. The tops of these partitions slope downward, the 

 lower end of the adjoining ones being on opposite sides of the 

 sluice, so that the water in descending is made to travel back 

 and forth across the way as many times as there are separate 

 compartments. Scale: One-fourth of an inch to the foot (/ ¥ ). 

 Designed by Alfred Swazey, of Bucksport, Me., in 1876. 29,288. 

 Model by C. G. Atkins. 



d. POOLS FORMED BY EDDIES IN THE CURRENT. 



Worrall's expandino-sluice fish- way. 



Model of fish- way built in the Susquehanna Biver at Columbia, Pa., 

 in 1866, showing the arrangement by which the floor or chan- 

 nel is widened, the object being to create eddies to serve as 

 resting-places for the fish. This fish-way, which is 45 feet 

 long, is' set into the masonry of the dam so that its base is in 

 line with the dam wall. It is 20 feet wide at the-top, gradually 

 increasing to 40 feet at the bottom. The dam is 6 feet high, 

 and the velocity acquired by the current in descending the 

 sluice is said to be less than 10 miles per hour. Scale: One- 

 eighth of an inch to the foot (^ ). Designed by James Worrall, 

 of Pennsylvania. 29,284. Model by C. G. Atkins. 



CHUTE OR TROUGH FISH-WAYS. 



(In which the ascent is so gradual that the fish succeed in overcom- 

 ing the current). 



Worrall's chute fish-way. 



Model of fish -way built in the Susquehanna Biver, at Columbia, 

 Pa., in 1873. It consists of a straight sluice-way, 120 feet long 

 and 60 feet wide, made of crib- work and filled with stone. 

 The fall is about 1 foot in 35, and the velocity acquired in the 

 descent is said to be less than 10 miles per hour. Scale : One- 

 eighth of an inch to the foot (-£%). Designed by James Wor- 

 rall, of Pennsylvania, 29,284 (?). Model by C. G. Atkins. 



