[77] fisheries of the united states. 1231 



8. Transportation apparatus and accessories. 



a. apparatus for transporting- fry. 



Fish Commission transportation .can. 



A cylindrical can of block-tin, the top of which is contracted and 

 provided with a cover to prevent splashing' of water while in 

 transit. Height, 24 inches ; diameter, 14 inches ; capacity, 12 

 gallons. U. S. Fish Commission. 20,911. This can is more 

 extensively used than any other kind for the transportation 

 of young shad, and pioves very satisfactory. The contrac- 

 tion of the neck, giving only a limited free surface, prevents 

 any violent agitation of the water. 



Clark's fish-transportation can. 



A cylindrical tin can with 20 circular traysof perforated tin. Diam- 

 eter, inches; height, 9 inches. Designed by Frank N. Clark, 

 Northville, Mich. 57.1G5. U.S. Fish Commission. The trays 

 rest one upon the other, a tube, which extends from the top to 

 the bottom of the can, passing through the center of each. The 

 water is introduced through this tube, passes to the bottom and 

 up through the eggs on its way to the outlet near the top of 

 the can. Each tray will accommodate one thousand salmon. 



Ferguson's transportation can. 



A cylinder of block-tin, with movable top fitted with a rubber rim 

 and thumb-screws for rendering it water-tight. 24 inches high 

 and 14 inches in diameter. Capacity, 12 gallons. This can is 

 provided with nipple attachments by means of which several 

 can be connected so that a current of water will flow from one 

 to another, thus giving a circulation during transit. This can 

 carries from 15,000 to 30,000 shad. 



Stone's conical transportation box. 



Model. A truncated cone of tin with perforated cover, capable of 

 holding ice for reducing temperature of water in can. Height, 

 12 inches ; diameter, 11 inches at base and 6 inches at top. De- 

 signed by Livingston Stone. 29,379. Presented by Livingston 

 Stone. This can is used in the transportation of various species 

 of salmonidse. Its principal advantages are derived from its 

 peculiar shape, which, according to the inventor, facilitates the 

 aeration of water. Cans of similar shape with the cone pro- 

 duced into a long funnel-shaped cover are frequently used. 



EOGERS'S TRANSPORTATION CAN. 



A cylindrical tin can provided with a false bottom one inch above 

 the other. In the center of the upper bottom is a circular open- 



