ANIMAL RESOURCES AND FISHERIES OF UNITED STATES. 243 



Witli rectaugular compartnieiits. 



23937. Moik'l of rectangular coiiipartineut fisli-way on the iucliuod-iilaue 

 system, in an extended arrangement. Seale, i inch to tlie foot 

 (/4). C. G. Atkius. 



Spiral fish-ways. 



2G949. No. 11. 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 the foot (-r^). C. G. Atkins. 



This model represents a fish-way precisely the same cai^acity and 

 slope, and adapted to a dam of the same height as Ko. 10, 

 showing the great economy of space and material eftected hy 

 the spiral arrangement. Further advantages of the spiral 

 arrangement are the facility with which water can be admitted 

 at diflerent heights of the river, and contiguity of the outlet 

 to the dam secured, so that the fish will readily find it. 

 •20931. Jlodel of Pike's spiral fish-way, devised by Hon. R. G. Pike, of Con- 

 necticut. Sale, I inch to the foot (iTi). C.G.Atkins. 



The advantages of this, the first spiral arrangement invented in 

 America, arc the same as those claimed for that arrangement 

 in Pikt^'s spiral fish-way. 



Moviag float fish-ways. 



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

 Waldorboro', Me. Scale, J inch to the foot (41,). 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 fiuctuations of the river, thus insuring that the entrance 

 shall always be at the right height to admit the requisite 

 <iuantity of water. 



^^^From natural enemies. 



Apparatii!!» Tor fle»troyiBi$;' injurious >ipecie$. 



Oyster-bed tangles. (See under B, 12.) 



Tellierxi and lioppBc!;!. 

 Ca;jre!< and pens. 



Kennels for <logs, &c. 

 Cages for aninuils. 

 Cages for birds. 

 Cages for insects. 



5031. Cages for fins-llies. West Indies. Miss Septimia Randolph. 



