FISHERY INDUSTRIES OF THE UNITED STATES, 1921. 3 



begun a series of market surveys, which has included the following 

 centers: Louisville, Ky.; Pittsburgh, Pa.; Chicago, 111.; and Minne- 

 apolis and St. Paul, Minn. The division has continued to aid in 

 increasing the use of by-products of the fisheries, in increasing the 

 use of fish as food, and in effecting improvements in the merchandis- 

 ing of fishery products and the methods of capture and has prepared 

 for publication, for the use of those interested therein, the results 

 of work completed. 



PUBLICATIONS OF THE DIVISION. 



During the calendar year 1921 the following publications, prepared 

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

 statistical bulletins for Boston and Gloucester, Mass.; Portland, Me.; 

 and Seattle, Wash. 



DOCUMENTS. 



Preservation of fish nets, by Harden F. Tavlor, 8°, 35 p., 1 text fig., Document 

 No. 898. 



Improvements in process of salting river herring, especially adapted to warm 

 climates, by Harden F. Taylor, 7 p.. Document No. 903. 



Fishery industries of the United States. Report of the di\'ision of statistics and 

 methods of the fisheries for 1920, by Lewis Radcliffe, 8°, 187 p., 9 figs., Document 

 No. 908. 



ECONOMIC CIRCULARS. 



Trade in fresh and frozen fishery products and related marketing considerations 

 in Jjouisville, Ky., by L. T. Hopkinson. 8°, 8 p., Economic Circular No. 50. 



Trade in fresh and frozen fishery products and related marketing considerations 

 in Pittsburgh, Pa., by L. T. Hopkinson. 8°, 9 p.. Economic Circular No. 52. 



Brine freezing of fish, by Harden F. Taylor. 8°, 8 p., Economic Circular No. 53. 



Trade in fresh and frozen fishery products and related marketing considerations 

 in Chicago, 111., by L. T. Hopkinson. 8°, 21 p., Economic Circular No. 54. 



STATISTICAL BULLETINS. 



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

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

 calendar year 1920. Statistical Bulletin No. 487. 



Statement, by months, of the quantities and values of certain fishery products 

 landed at Boston and Gloucester, Mass., and Portland, Me., by American and 

 Canadian fishing vessels during the year 1920. Statistical Bulletin No. 488. 



Statement by fislaing grounds, of quantities and values of certain fishery products 

 landed at Boston and Gloucester, Mass., and Portland, Me., by American and 

 Canadian fisliing vessels diu'ing the calendar year 1920. Statistical Bulletin No. 489. 



Fisheries of the South Atlantic States, 191S. Statistical Bulletin No. 494. 



Fisheries of the New England States in 1919. Statistical Bulletin No. 497. 



NOTES ON FISHERY APPARATUS. 

 SWEEP NET OR SEINE. 



In view of the widespread interest aroused by the introduction of 

 the Danish sweep net or seine (snurrevaad) in the British fisheries, 

 the following notes on operation and construction may be of interest 

 to American fishermen as well. In construction the sweep net is 

 similar to the otter trawl, but it is smaller and less expensive and can 

 be operated by smaller vessels at less expense. In operation one 

 end of the warp is attached to a buoy held in position by an anchor 

 while the vessel follows a circular course laying the net across the 

 tide, bringing the two ends of the warp together at the buoy. The 



