52 



CONTROL BULLETIN No. 70 



In connection with obtaining data on the water soluble portion of the pro- 

 tein of meat scraps sold in the Massachusetts markets, analyses were also made 

 of the fish products officially collected in 1933. It should be understood, how- 

 ever, that the experimental work in Indiana applied to meat products alone and 

 may or may not apply to fish residues. The data are presented merely as a 

 matter of record, and conclusions should not be drawn unless substantiated by 

 experimental proof. 



Water Soluble Protein of Fish Meals. 



Manufacturer and Brand. 



Total 



Protein 



Per Cent. 



Insoluble 

 Protein 

 Per Cent. 



Soluble 

 Protein 

 Per Cent. 



Percentage of 



Total Protein 



Soluble. 



Flag Fish Meal Co. 



Flag Fish Meal . 

 Flag Fish Meal 

 Average 



John C. Dow Co. 



Fish Meal . . 



Gorton-Pew Fisheries Co. 



Cod Fish Meal . . . 

 Cod Fish Meal . . . 

 Cod Fish Meal . . . 

 Average 



Maine Fish Meal Co. 



Maine Fish Meal . 

 Maine Fish Meal . 

 Average 



Sardine Fish Meal 

 Sardine Fish Meal 

 Sardine Fish Meal 

 Sardine Fish Meal 

 Average 



Jas. F. Morse Co. 



Fish Meal . . . 



New England Rendering Co. 



Cod and Haddock . . . 



Portsmouth Fisheries 



Feeders Special 



John Reardon & Sons Co, 



Cod and Haddock 

 Cod and Haddock 

 Cod and Haddock 

 Cod and Haddock 

 Average 



Chas. M. Struven Co. 



Fish Meal .... 



Wilmington Packing Co. 



White Fish Meal . . . 

 White Fish Meal . 

 Average 



67.52 

 68.22 

 67.87 



56.92 

 57.23 

 59.72 

 57.96 



56.39 

 58.98 

 57.69 



58.06 

 58.58 

 57.79 

 57.97 

 58.10 



63.97 

 67.13 

 63.13 



67.69 

 60.42 

 65.77 

 68.22 

 65.65 



66.34 

 61.82 

 64.08 



48.22 

 50.44 

 55.17 

 51.28 



46.11 

 48.62 

 47.37 



47.01 

 49.70 

 48.45 

 49.70 

 48.72 



40.32 

 42.40 

 59.30 



41.72 

 36.53 

 41.73 

 42.26 



43.26 

 44.12 

 43.69 



31.11 

 26.16 

 28.64 



8.70 

 6.79 

 4.52 

 6.67 



10.28 

 10.36 

 10.32 



9.34 

 8.27 



23.65 

 24.73 

 3.83 



25.97 

 23.89 

 24.04 

 25.96 

 24.97 



23.08 

 17.70 

 20.39 



38.35 

 42.22 



15.28 

 11.86 

 7.57 

 11.57 



18.23 

 17.57 

 17.90 



19.03 

 15.16 

 16.16 

 14.27 

 16.16 



38.37 

 39.54 

 36.55 

 38.05 

 38.13 



34.79 

 28.63 

 31.71 



A wide range in the water soluble protein content of these products is shown, 

 due no doubt to several causes, prominent among which would probably be the 

 kind of fish from which the material was derived. It might also depend upon 

 whether the whole fish or only a part was used. The fish meals containing the 

 lowest amounts of water soluble protein are probably glue residues. 



Investigation which parallels that on meat products in Indiana should prove 

 advantageous, as the fish meals vary to a greater extent in water soluble protein 

 than do meat scrap and meat tankage. 



