396 U. S. BUEEAU OF FISHERIES 



Under the general subject of the composition of fish meals are dis- 

 cussed : The manufacture of fish meals, the effect of storao;e on fish 

 meals, analyses of fish meals, and adulteration of fish meals. 



MANUFACTURE OF FISH MEALS 



! 



Inasmuch as this publication is designed primarily for the animal 

 feeder and others in the agricultural and fishery industries interested 

 in nutrition, no effort will be made herein to go into the details of 

 the different methods and processes of manufacture. Enough has 

 been said in the introduction to give a general idea of the common 

 methods now in use for the preparation of fish meals. But, for the 

 benefit of those readers who may wish to study this subject, the fol- 

 lowing references, listed in the bibliography!^ contain data on the 

 production or manufacture of fish meals: Turrentine, 1915; Orr,. 

 Crichton. and Green, 1922; Dill, 1923; Ingvaldsen. 1929 and 1929a; 

 Jewett, 1918; Dunlap, 1918 and 1920; United States Bureau of Fish- 

 eries, 1919 and 1930; Ministry of Agriculture and Fisheries, 1919; 

 Wilgress, 1924; Bellwood, 1928; Conn, 1929a; Tressler, 1923; Le 

 Clerc, 1928a; Manning, 1929: Vilbrandt and Abernethy, 1930; 

 Greer, 1915. 



EFFECT OF STORAGE ON FISH IMEALS 



Davies (1925 and 192G), in investigations on fish meals, has de- 

 scribed at considerable length, the nature of the water-soluble nitro- 

 gen compounds and the changes occurring in the water-soluble ni- 

 trogen and in the amount of water-soluble phosphorus with different 

 methods of treatment and storage. 



Harrison, of the United States Bureau of Fisheries, has shown 

 that fish meals, in storage, diminish in extractible fat, as indicated b}^ 

 a diminishing ether extract of the fish meals tested.^* 



ANALYSES OF FISH AND SHELLFISH 3IEALS 



The following references, listed in the bibliography, contain an- 

 alyses of various types of fish meals and shellfish meals : Weren- 

 skiold, 1898; Liechti, 1910; Schenke, 1903; Hals and Kavli, 1903; 

 Darbishire and Goodwin, 1910; Bericht der Agrikultur Chemischen 

 Kontroll Station, 1910; Kellner, Lehmann, and Konig, 1909; Curry 

 and Smith, 1911: Haselhoff, 1910, 1911, 1912; Street, 1912; Smith 

 and Beals, 1913; Kling, 1914; Hills et al., 1914; New York Agricul- 

 tural Experiment Station, 1914; Journal of the Board of Agricul- 

 ture, 1914; Smith and Beals, 1914; Jones et al., 1914; Curry and 

 Smith, 1914; Street, Shepard, and Davis, 1914: Clark, 1915; Wes- 

 sels, 1915; Smith, Beals, and Howard, 1915; Curry and Smith, 1915; 

 AVilk, 1915: Wessels and Fitts, 191G: Curry and' Smith, 191G; New 

 York State Agricultural Experiment Station, 1916; Smith, 1916; 

 Youngblood,^1916; Shutt, 1915; Jones et al., 1916; Cathcart, 1916; 

 "Wessels, 1917: New York State Agricultural Experiment Station, 

 1917; Smith, 1918; Cathcart, 1918; Shutt, 1919; New York State 

 Agricultural Experiment Station, 1918; Bai-tlett, 1917; Jewett, 

 1918; Dunlap, 1918; United States Bureau of Fisheries, 1919; Min- 



" Unpublished data in the files of the Bureau of Fisheries, by Roger W. Harrison. 



