UTILIZATION" OF THE FISH WASTE OF THE PACIFIC OCEAN, 



23 



Sound, 300 on the Washington coast other than Puget Sound, 5,746 

 on the Columbia River, 2,381 on the Oregon coast, 4,789 on the Sacra- 

 mento River, and 550 on Monterey Bay. 1 The waste in " mild-cur- 

 ing " amounts to about 25 per cent, or 250 pounds per tierce. The 

 total waste in the industry, then, is about 3,100 tons. 



Of pickled or salted salmon, 37,841 barrels of 200 pounds each 

 were prepared in Alaska. Most of this was packed in western 

 Alaska. In the State of Washington an additional number of 4,610 

 barrels were packed. The waste from this branch of the salmon- 

 packing industry, on the basis of 25 per cent, or 75 pounds per barrel, 

 amounts to 1,587 tons. 



CHEMICAL COMPOSITION OF THE RAW CANNERY WASTE. 



Analyses of samples of the waste from humpback salmon were 

 made by J. R. Lindemuth, of the Bureau of Soils. The material 

 from which the samples were taken was collected from the floor of a 

 cannery in Alaska ; after the addition of formaldehyde, it was sealed 

 in tin for shipment. While its preservation was not perfect, the 

 changes which took place within it during transshipment are not 

 considered great enough to have altered materially its ultimate chem- 

 ical composition or to have lessened the value of the subsequent 

 analysis. From this material three samples were prepared, one of 

 heads, one of fins and tails in equal proportions, and one of roe and 

 milt in equivalent proportions. 



Moisture was determined by evaporating to dryness a definite 

 weight in a steam bath at a temperature of 100° C. Nitrogen, oil, 

 and phosphoric acid were determined in the dry samples by the usual 

 methods of analysis. In the last column of the tables are given the 

 figures representing the content in oil, in gallons per raw ton, of 

 the different samples. This figure is arrived at by calculating to 

 gallons from the percentage composition of the dry sample of each, 

 the value 0.925 being taken to represent the specific gravity of the oil. 



Table VI. — Analyses of samples of the raw material produced as waste in the 

 mechanical dressing of " humpback " salmon. 



[Material taken from the floor of the cannery of the Pure Food Fish Co., Ketchikan, 



Alaska, July, 1913.] 



Character of sample. 



Moisture. 



Nitrogen. 



Phos- 

 phoric 

 acid. 



Bone 



phos- • 



phate 



Ca 3 (P0 4 ) 2 



Oil. 



Oil per 

 ton. 





Per cent. 

 68.7 

 63.2 

 63.26 



Per cent. 



. 3.68 



2.65 



3.11 



Per cent. 

 1.08 

 1.54 

 2.20 



Per cent. 

 2.35 

 3.36 



4.80 



Per cent. 

 3.18 

 13.70 

 11.16 



Gallons. 

 8.24 



Heads 



35.51 



Fins and tails 



28.94 







Average 



64.6 



3.02 



1.59 



3.46 



10.43 



27.05 



!Salt Fish Statistics, ibid., 85 (1914). 



