242 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [12] 
been re-caleulated to make the footings 100 per cent.; the original and 
the altered figures being given under “Summary.” 
Further explanations, with recapitulations of the figures in this and 
thie following tables, may be found in Part III of this report. 
TABLE III. 
As is explained in ‘Methods of Analysis,” some attempts have been 
made toward what might be called a complete analysis of the flesh. The 
figures are recapitulated in this table. The “Extractive matters” in- 
clude, as stated, all the materials dissolved out by cold water, and not 
coagulated by boiling; “Albumen,” the portion of the cold water extract 
coagulated by boiling; ‘Gelatin,” the portion soluble in hot water; Fats, 
the portion soluble in ether; and “Insoluble protein,” the residue in- 
soluble in water and in ether, The footings generally exceed 100 per 
cent., perhaps from incomplete separation of water or fats from some of 
the ingredients, as stated under “ Methods of Analysis,” though care was 
taken to get them as pure as practicable. 
TABLE “EV: 
This table gives a general résumé of such of the results as are most 
important for estimating the nutritive values of the samples. The fig- 
ures, except those in the last column, ‘Total edible solids,” are taken 
from Table II. 
METHODS OF ANALYSIS. 
PREPARATION OF SAMPLES FOR ANALYSIS. 
Separation of edible portion ( flesh) from refuse (bones, skin, entrails, 
spawn, &c.).—The sample, as received at the laboratory, was weighed; 
the edible portion, “ flesh,” was then separated from the refuse, and both 
were weighed. There was always a slight loss in cleaning, due evidently 
to evaporation and to slimy and fatty matters and small fragments of 
the tissue that adhered to the hands and to the utensils used in prepar- 
ing the sample. Perfect separation of the flesh from the other tissues 
was difficult, but the loss resulting from this was small, so that, though 
the figures obtained for edible portion represent somewhat less than 
was actually in the sample, yet the amount thus wasted was doubtless 
scarcely more than would be left unconsumed at an ordinary table. 
The reasons for rejecting the skin, which generally has considerable 
nutritive value, were that its chemical constitution is different from that 
of the flesh, and that, so far as we have observed in this country, it is 
not ordinarily eaten. With the closer domestic economy that increased 
density of population must bring, people will doubtless become more 
careful hereafter to utilize such materials. 
Sampling.—The whole edible portion was finely chopped and carefully 
mixed in a wooden tray. 
