1240 FISHERIES OF THE UNITED STATES. [$6~] 



Siphon-tube— Continued. 



in removing stale water while in transit. U. S. Fish Commis- 

 sion. 57,156. 



SlPHON-TUBE. 



A piece of five-eighths inch rubber tubing, 4 feet long, used in con- 

 nection with the siphon-strainer for removing stale water from 

 cans containing young fish. U. S. Fish Commission. 26,912. 



SlPHON-STRAINER. * 



A tin tube, with funnel-shaped top and perforated tin bottom, 25 

 inches long and 3 inches in diameter. IT. S. Fish Commission. 

 This tube is used when changing the water on young shad, or 

 other species, while in transit. It is placed in the can of fish,, 

 the water passing through the strainer before being drawn off 

 by the siphon, the end of which is introduced into it. 



Still well's aerating- pump. 



A tin tube the lower end of which is incased in perforated tin to 

 prevent the fish from being drawn into it. The spout is also 

 provided with a covering of perforated tin, and the water which 

 is forced through is broken into a great number of minute 

 streams or jets, thus giving complete aeration. Invented by 

 E. M. Stillwell, Bucksport, Me. Presented by E. M. Stillwell. 

 57,157. This pump is used in aerating the water in which fish 

 are transported, when it is not convenient to procure a fresh 

 supply. In aerating, the pump is inserted in the mouth of the 

 can and the water is pumped up and forced through the per- 

 forated tin spout, falling back again into the can. 



Water-bucket. 



A cylindrical bucket of block tin, provided with a bail and strength - 

 - ened by iron hoops. Depth, 14 inches; diameter, 12 inches. 

 U. S. Fish Commission. 57,170. This bucket is used in con- 

 nection with the siphon tubes fur changing the water on the 

 young fish while in transit. 



9. Models and photographs illustrating the history and 

 methods of fish-culture. 

 Hatching-table. 



In three parts, showing small sized models of the various kinds of 

 hatching apparatus used in the United States, in actual work- 

 ing order, the water being supplied by means of a gas pump- 

 ing engine which forces it into closed pipes with a pressure of 

 15 pounds to the square inch. Stop-cocks are placed at fre- 

 quent intervals in these pipes and are connected with the hatch- 

 ing apparatus by means of rubber tubing. The apparatus is 



