CHAPTER XII 



By-Products of the Fishery Industries 



FEW of us realize tLe extent to which the 

 numerous by-products of our fisheries enter 

 into our daily life and aid in the enjoyment of 

 many of our modern conveniences. Fish oils, meals, 

 liver oil, fish scrap, fish glue, isinglass and shark-skin 

 have many important uses with which most persons 

 are not familiar. In Chapter II many of the every- 

 day uses of fish oil were pointed out. Fish glue has 

 nearly as many and as varied uses as fish oil; these 

 uses also have already been indicated. Fish scrap pre- 

 pared from fish waste and from fish not commonly 

 eaten, such as the menhaden, finds extensive use as 

 meal for the feeding of cattle, sheep, hogs, and 

 chickens, and in the preparation of all sorts of 

 fertilizers. 



Isinglass, prepared from fish sounds (swim- 

 bladders), no longer possesses great commercial im- 

 portance, but its uses are varied. This curious sub- 

 stance is used in the preparation of the better grades 

 of court-plaster, for the clarification of certain 

 beverages, especially fine wines, and in the prepara- 

 tion of certain adhesives, especially belt cements. 



Recently leather manufactured from the skins of 



fish has become very popular. Shark-skin leather has 



been manufactured in large quantities in recent 



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