FISHERIES OF THE UNITED STATES. 213 



incli:n^ed fish-ways without steps. 



With ])artition.s placed ol)li(iuely. 



•29-2c<7. An aduptation ot Foster's lish-way. Di-signod by C. G. Atkius, and 

 built at Pembroke. Mo. Scale. J^ iucli to the loot. C. G. Atkius, 

 Bncksport, Jle. 



29-2tiV>. Model of Fo.ster's lish-way. Iu\ eiiteil by H. H. Foster, East Machias, 

 Me. Scale, i inch to the foot. C. G. Atkius, Bucksport, Me. 



29288. Model of oblique lish-way. Invented by Alfred Swazey, Bucksport, 



Me., ill 1876. Scale, ^ inch to the foot. C. G. Atkins, Bucksport, 

 Me. 



29289. Swazey's oblique fish-way. Invented by Alfred Swazey, Bucksport, 



Me., in 1874. Scale, i inch to the foot. C. G. Atkins, Bucksport, 

 Me. 

 26939. Model of the fish-way at Lawrence, Mass., on the Merrimack River. 

 Scale, i inch to the foot (^ir). C. G. Atkins. 



With rectaugitlar compartnieiits. 



26937. Model of rectanj^ular compartment fish-way on the inclined-plane 

 system, in an extended arrangement. Scale, ^ inch to tlic foot 

 (^). C. G. Atkins. 



SPIRAL FISH WAYS. 



26931. Model of Pike's spiral fish-way, devised by Hon. R. G. Pike, of Con- 

 necticut. Scale, ^ inch to the foot (t/j). C. G. Atkins. 



26949. Model of rectangular compartment fish-way on the inclined-plane 

 system, in spiral arrangement, devised by Charles G. Atkins, of 

 Bucksport, Me., in imitation of Pike's spiral fish-way. Scale, ^ 

 inch to tlu* foot {-i\-). C. G. Atkius. Showing the great economy 

 of space and material eftected by the spiral arrangement. Further 

 advantages of the spiral arrangement are the facility with which 

 water can be admitted at ditferent heights of the river, and con- 

 tiguity of the outlet to the dam secured, so that the fish will readily 

 find it. 



39306. Model of the fish- way at Bangor, Me., on the Penoliscot River; 

 designed liy Charles G. Atkins, and built by the city of Bangor in 

 1877 at a cost of $6,000. Scale .jV. Height of the dam 16 feet 

 (4.1 meters). 



39497. Model of fi.sh-way. Designed by B. F. Shaw, State fish commissioner, 

 Auamosa, Iowa. 



MOVING FLOAT FISH- WAYS. 



26930. Model of Everleth's fish- way, devised by F. M. Everleth, M. D., of 

 Waldoboro', Me. Scale, i inch to the foot (Vv)- C. G. Atkins. 

 The peculiarity of this fish-way is the movable attachment at 

 the upper end, which, by its own buoyancy, rises and falls 

 with the fluctuations of the river, thus insuring that the en- 

 trance shall always be at the right height to admit the requi- 

 site quantity of water. 



