[63] FISHERIES OF THE UNITED STATES. 1217 



Bicardo's smelt-hatching box — Continued. 



is strong, the water entering and escaping through the circular 

 opening at the end. 



APPARATUS FOE, FLOATING EGOS. 

 a. APPARATUS FOR UTILIZING WAVE ACTION. 



Wave hatching box. 



A rectangular box, with a wire cloth bottom and openings covered! 

 with the same material on the sides. Just below these, on the 

 outside of the box, are wooden strips which serve as floats for 

 holding the box in the proper position in the water. Length,. 

 32 inches; width, 17 inches; depth, 16 inches; float, 3 inches 

 wide. Invented by H. C. Chester, Noank, Conn., 1878. 57,161. 

 U. S. Fish Commission. This box is employed in open streams 

 for utilizing currents caused by the action of the waves. The 

 box when placed in the water sinks to such a depth that the 

 floats which extend around its exterior rest upon its surface.. 

 The upper portions of these floats make a slight angle with the> 

 surface, so that each wave as it comes in contact with the float 

 runs up a slight incline, and after reaching the highest point 

 passes down into the box, thus giving a constant circulation! 

 and the best possible motion to floating eggs. 



b. APPARATUS REQUIRING RUNNING WATER. ♦ 



Clark's adhesive egg apparatus. 



C. MECHANICAL APPARATUS. 



Chester's semi-rotating hatcher. 



A cylindrical can, with five rectangular openings of wire cloth on the* 

 side and a bottom of the same material, to admit a circulation 

 of water and to prevent the loss of eggs or the escape of fish 

 after they have been hatched. Beneath the wire cloth bottom 

 are four strips of tin radiating from the center and placed at 

 such an angle that the rotation of the cylinder upon a vertical 

 axis forces the water against them and up through the bottom. 

 Invented by H. C. Chester, of ISToank, Conn., in 1878. Pre- 

 sented by H. C. Chester. 57,160. Several of these are placed 

 in a trough containing running water. Each bucket turns on 

 a pivot, the power being applied from the engine by means of 

 a horizontal arm fixed to its axis, and is kept constantly turn- 

 ing backward and forward through an arc of 30 degrees, thus 

 creating a free circulation of water, which gives a motion to 

 the eggs. Used chiefly for floating eggs like those of the cod. 

 2444— Bull. 27 77 



