REFKKiKKA HON OF FISH 



603 



shapes are not excessively varied, a limited number of cans should 

 serve; but where these vary greatly, as often occurs in public ware- 

 houses, especially those that freeze sea fish, a variety of sizes and 

 shapes would be necessary. The Larger kinds of (ish do not pack to 

 advantage in these cans, the difficulty being to secure contact with 

 the sides of the cans. For this work Peterson has designed specially 

 shaped freezing receptacles. 



Fig. 38. — Petersen's method for freezing fish singly. The fish are slipped, tails 

 downward, into the thin metal sheaths 



INDIVIDUAL FREEZING 



Instead of cans for a number of fish, a sheathlike, sheet-metal 

 container is used for individual large fish. The container is made 

 by bending around a thin metal sheet after the fashion of a starched 

 cuff and crimping and riveting the edges together. The bottom 

 is made narrower than the top and is also sealed. This arrange- 

 ment makes a sheath somewhat resembling the shape of a fish, the 

 round side fitting the back and the sharp side the belly. The fish 

 is put in, tail down, the metal being sprung open so as to exert a 



22279—27 8 



