1238 FISHERIES OF THE UNITED STATES. [84] 



Clark's whitefish crate — Continued. 



Fish Commission. 57,167. This crate is used only for short 

 distances, and chiefly for sending eggs from the fishing shores 

 to the hatchery, a distance of 20 to 50 miles. The trays are 

 provided with canton-flannel bottoms, upon which the eggs are 

 placed ; these in turn are covered with a layer of cloth, the re- 

 maining space in the tray being filled with wet moss. 



McDonald's egg-keel. 



A simple contrivance by means of which adhesive eggs are at- 

 tached to cotton cord, to facilitate hatching and transporting. 

 Frame: height, 23 inches ; width, 14 inches; length of reel, 12 

 inches ; breadth of reel, 10 inches ; diameter of funnel, 6 inches. 

 Invented by Marshall McDonald. 1882. 57,152. U. S. Fish 

 Commission. To be used in transporting eggs of the alewife 

 , and perch. The square box at the bottom contains a ball of 

 twine, the end of which passes up through the opening in the 

 funnel and is fastened to the reel. The eggs are placed with 

 water in the funnel, and, as the cord is drawn through them by 

 means of the crank and reel, quantities of them adhere to it 

 and are reeled upon the frame. When a frame has been filled 

 it is transported, in a crate holding twelve of them, to the 

 hatchery, where the strings with the eggs are removed and 

 suspended in the proper hatching apparatus. If desirable, the 

 entire frame with its contents can be placed in the hatching 

 apparatus. 



Clark's egg-transportation case. 



Model, scale 4 inches to the foot. A wooden case containing twenty 

 trays, each consisting of a piece of canton-flannel stretched 

 across a wooden frame. Patented by Nelson W. Clark, of 

 Charleston, Mich., March 31, 1874. 57,166. This case is used 

 chiefly for transportation of eggs of the whitefish (Coregonus 

 clupeiformis), though it is often successfully used for salmonoids 

 and other fishes. 



Atkins's transportation box. 



Scale, 6 inches to the foot. A wooden box containing four smaller 

 boxes, in each of which 15,000 salmon eggs are placed upon 

 layers of muslin. Devised by Charles G-. Atkins, Bucksport, 

 Me. The space between the larger and smaller boxes is filled 

 with hay to prevent an unhealthy change of temperature, and 

 the layers of eggs are separated from each other by wet moss. 

 Eggs packed in this way can be sent several thousand miles 

 with very satisfactory results. 



