560 



U. S. BUREAU OF FISHERIES 



these sticks. The water is taken up with stiff scrubbing brushes, 

 narrow enough to reach into crevices, and the fish are scrubbed vigor- 

 ously to remove the glaze. The fish are rinsed in the soda solution 

 and then in the other tank of fresh tepid water. They are then 

 placed in the sharp freezer for a short time to harden the surface 

 and finally are glazed as usual and returned to the storage room. 



TRANSPORTATION OF FROZEN FISH 



RAILWAY TRANSPORTATION 



In cool weather frozen fish may be transported in small lots in 

 ordinary cars for short distances. For this purpose the boxes may 

 be wrapped with several thicknesses of heavy wrapping paper, tacked 



Fig. 20.- 



-Delivery of frozen fish to trucks. Courtesy, Brooklyn Bridge Freezing 

 & Cold Storage Co. 



on. The shipment of frozen fish in warm cars is not very satisfac- 

 tory, however, if the fish are to be kept frozen after arrival at their 

 destination. For the great bulk of frozen fish shipped, refrigerator 

 cars are used. These are railway freight cars with double wooden 

 walls, with 1 to 4 inches of felt between the wood facings, which are 

 lined with tar paper. There are cars with only 2 inches of air space 

 or 1 or 2 inches of felt insulation in the walls, but these, and also cars 

 with metal roofs and steel braces in the sides, which are heated in the 

 sunshine, are less suitable for frozen fish. Refrigerator doors are 

 provided with compression bolts for tight closure. In each end of the 

 car is a space or " bunker " for ice, or ice and salt. Each bunker is 

 provided with a hatch at the top for charging with ice, and drain- 





