[55] FISHEKIES OF THE UNITED STATES. 1209' 



Stone's parlor hatching trough. — Continued. 



per and lower bottoms slope in opposite directions. The water 

 enters through an opening in the glass, passing over the cleats, 

 which serve as resting places for the fish, to the lower end, and 

 after passing through a small hole, follows the lower bottom to 

 the opposite end, where it escapes through the outflow pipe. 



BUCKSPORT HATCHING-TROUGH. 



A section of hatching-trough showing two compartments complete, 

 with nests of trays. Each compartment contains a frame 

 which is closed when in use, but can be opened for convenience 

 in removing them. Length, 31 inches; width, 15 inches;, 

 depth, 17 inches. Employed by Charles G. Atkins, of Bucks- 

 port, Me., for hatching eggs of various species of salmonidae. 

 Charles G. Atkins. 26,936. 



Atkins's hatching-tray. 



Photograph showing a nest of hatching-trays, devised by Charles 

 G. Atkins, for use in hatching eggs of the Atlantic salmon. 

 These trays are placed in troughs and a current of water is 

 allowed to pass through them horizontally. Size, 8 by 10 

 inches. Bucksport, Me., 1882. (762). 2,221. U. S. Fish Com- 

 mission. 



Hatching- apparatus. 



Photograph of the apparatus employed in hatching eggs of the 

 Atlantic salmon at the hatchery of the U. S. Fish Commis- 

 sion at Buckport. Size, 8 by 10 inches. Bucksport, Me., 



1882. (753) 2,214. XL S. Fish Commission. 



Atkins's hatching crate. 



A frame of metal and wood, with hinged cover, which incloses a 

 nest of nine egg-trays. Length, 12 inches ; width, 12 inches ; 

 depth, 7 inches. Designed by Charles G. Atkins, of Bucksport, 

 Me. Presented by Charles G. Atkins. 26,935. This crate is 

 used chiefly for hatching eggs of the salmonidse. The trays are 

 provided with corner strips of wood, which .separate them 

 slightly from each other to allow free circulation of water, 

 though the spaces are not large enough to allow the escape of 

 eggs. These crates can be placed either in the open stream or 

 in ordinary troughs. 



b. APPARATUS WITH AN UPWAKD CURRENT. 



Holton hatching-box. 



A square wooden box, with a tin bottom sloping downward and in- 

 ward toward the center, where the inflow opening is situated. 



