UTILIZATION OF TI1K FISH WASTK OF TIIK 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, 4,780 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. E. 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 material^ 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 J.00 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. 
Hoe and milt (50 per cent each) 
Per cent. 
68.7 
63.2 
63. 26 
Per cent. 
3.68 
2.6.5 
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 
64.6 
3. 02 
1.59 
3. 46 10. 43 
27.05 
- 
Salt Fish Statistics, ibid.. 85 -(1914). 
