FISHERY INDUSTRIES OF THE UNITED STATES, 1925 207 



Canning of sardines. — Efforts to bring about the commercial de- 

 velopment of a new process of preparing sardines developed by the 

 bureau are meeting with success. Two small plants in Maine and 

 one in Canada erected equipment and used the new process, and the 

 product prepared by them is being received favorably. 



Preservation of nets. — Large-scale practical tests of copper oleate 

 and copper oleate-copper paint mixtures were conducted in coopera- 

 tion with fishermen at several points on the Atlantic coast. These 

 tests, which are still under way, are being made to show the real 

 saving that can be achieved from the proper application of copper 

 compounds to different kinds of gear and to learn, if possible, how 

 to lower the cost of treatment. They will have to be continued at 

 least one season longer before conclusive results can be obtained. 



Utilization of by-products. — Methods of manufacturing fish meal 

 and oil in the United States were studied thoroughly during the first 

 half of the year. Research was then begun to reduce the losses in 

 protein and oil wasted in press liquors now discarded. This work 

 must be carried further before a report can be made upon it. 



As a sanitary measure, the State of Texas has considered requiring 

 all shrimp canners to utilize their waste products. When informed 

 of this, the bureau, cooperating with the State, studied the situation 

 and advised what kind of process and equipment were best suited 

 for this purpose. It was possible, also, to show that a reasonable 

 profit usually could be made from such operations. Similar atten- 

 tion was given to the utilization of market waste, in particular the 

 waste from haddock-filleting operations. This work is being con- 

 tinued. 



Preparation of sturgeon caviar. — During the sturgeon season on 

 the Delaware River the bureau took advantage of an opportunity to 

 give demonstrations before fishermen and others of the Russian 

 method of preparing caviar. Such instruction was given 'at a num- 

 ber of places by a Russian skilled in foreign methods. Russian 

 caviar is of the highest quality, and a knowledge of the methods used 

 in its preparation will assist American fishermen in making caviar 

 of high quality. 



PUBLICATIONS OF THE DIVISION 



During the calendar year 1925 the following publications, pre- 

 pared in this division, were issued. This list does not include the 

 monthly statistical bulletins for Boston and Gloucester, Mass., Port- 

 land, Me., and Seattle, Wash., nor the monthly publication of the 

 cold-storage holdings of frozen fish. 



DOCUMENTS 



Iodine content of preserved sea foods. By Arthur W. Wells. 8°, 4 pp. Docu- 

 ment No. 979. 



Mild curing of salmon in California. By W. L. Scofield. 8°, 14 pp. Docu- 

 ment No. 983. 



Pearl Essence : Its history, chemistry, and technology. By Harden F. Taylor. 

 8°, 22 pp., 1 fig. Document No. 989. 



STATISTICAL BULLETINS 



Statement, by fishing grounds, of quantities and values of certain fishery 

 products landed at Seattle, Wash., by American fishing vessels . during the 

 calendar year 1924. Statistical Bulletin No. 641. 



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