1136 FISHERIES OF THE UNITED STATES. [*06] 



Bone dust of sturgeon (Acipenser sp.). 



Mixed with certain chemicals this dust is said to produce a very 

 fine and durable cement for chinaware, &c. Albany Beef 

 Packing Company, 372 Greenwich street. New York. 



GLUE FROM FISH-SKINS. 



Liquid isinglass for adhesive paper, labels, and envelopes ; isin- 

 glass for court-plasters ; pure fish glues (hard and liquid, free 

 from salt), for leather belting, roll cots, card felting, &c. 

 Exhibit of Gloucester Isinglass and Glue Company, Gloucester, 

 Mass. 



1. Sample of the stock selected for making glue just as it comes 



from the salt fish. "The cod (Gadus morrhua) and cusk (Bros- 

 mius brosme) skins are preferred to any others as they contain 

 a larger percentage of glue or isinglass. Last year there were 

 about 1,500 tons of this kind of stock used in Gloucester for 

 glue and isinglass, at a value of $15 per ton." 



2. Cod skins, after being cleaned and the salt removed, ready to be 



made into isinglass or liquid glue. 



3. Cusk skins, after being cleaned and the salt removed, ready to 



be made into glue. 



4. Hake {Phycis chuss) skins, after the salt has been removed and 



cleaned. The percentage of glue is small in these skins. 



5. Haddock [Melanogrammus ceglefinus) skins prepared for glue. 



The percentage of glue is small. 



6. Pollock (Pollachus carbonarius) skins, after being cleaned and salt 



removed. The percentage of glue is small. 



7. Show case or frame, with rolls of colored isinglass made from the 



skins of cod and cusk. 

 8,9. Cod and cusk isinglass made from the skins. "It is used in 

 very large quautities in the United States for the manufacture 

 of court-plaster. The manufacturers produce yearly about 

 $50,000 worth of goods." 



10. Dry fish-glue made from haddock, hake, and pollock skins. 



11. Liquid isinglass or glue used for gummed paper labels and en- 

 velopes, from cod skins. 



12. Liquid isinglass, for the same use, made from cusk skins. 



13. Liquid isinglass made from hake skins. 



14. Liquid isinglass made from haddock skins. 



15. Liquid isinglass made from pollock skins. 



16. Mucilage made from fish-skins, for office and express uses. 



17. Sample book of gummed paper from the Dennison Manufactur- 

 ing Company, of Boston, Mass. " This was gummed with liquid 

 isinglass ; 10,000 reams of paper were used in the United States 

 last year. The isinglass and labor on same would amount to 



