lis 



IT. S. HUHEAII OF FISHERIES 



23 per cent iii tlic glazed lish control to 6 per cent in the treated 

 fish. It is estimated that this treatment will cost the producer less 

 than 1 cent per 40 pounds of fish, and will not detract in any way 

 from the value. In fact, it enhances the value of the fish, as cotton- 

 seed oil is edible and is often used as frying fat. 



During the time when this work was being conducted at the request 

 of the authorities of the District government, the technologist offered 

 suggestions which would tend to increase the attractiveness of the 

 Municipal Fish Market. These dealt with the sanitary conditions, 



Figure 2.— Fish packaging 



improvements in refrigeration facilities for the stores, and general 

 recommendations . 



LEACHING OF FOOD AND MINERAL VALUES 



It has been recognized for several years that there is appreciable 

 loss of food value and mineral constituents when fish are packed in 

 contact with crushed ice. The water from the melting ice drips over 

 the fish and results in a leaching effect. 



The losses incurred in weight of the fish in food and mineral value 

 have never been determined, and very little has been done to prevent 

 losses of this nature. In preliminary experiments it was found to 

 be as high as 4 pounds per ton over a period of seven days. This 

 apparently is not a great loss until it is multiplied by the amounts 

 of fish handled in crushed ice over a period of a year; then it begins 

 to assume proportions which are really surprising. 



In this same consideration it should be emphasized that the flavor 

 and mineral constituents of the fish are the most important con- 



