710 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
The details of the analyses of the proximate ingredients as directly 
determined are somewhat complicated, as may be seen from the illus- 
trations given. The results are at best unsatisfactory, and it is not 
deemed desirable to tabulate the details in full. 
Laboratory Number 20. 
Name: Red snapper, Lutjanus blackfordi. 
Locality : Fernandiua, Florida. 
Received: November 28, 1879, from Mr. Blackford. 
Description : One whole fish. 
Weighings in preparation for analysis. 
Qrms. 
Lb. 
Oz. 
Per cent. 
Flesh 
2,104.6 
4 
10.2 
60.00 
Refuse 
1,388.9 
3 
1.0 
39. 60 
Loss 
14. 0 
.... 
0.5 
0. 40 
Total 
3,507.5 
7 
11.7 
100. 00 
Analysis of flesh. 
Water, 
(Dried in 
hydrogen). 
Fr," —22.5 grm. partially dried, “ Pd.” = 
Wfr. ” = ) . 
! Av’ge 92.45 % 
Wfr. "=f Wfr. in Pd. 
(Partial drying. — 95.5 grm. fresh substance, 
| 23.56 % Pd. in Fr. 
| Complete drying. — 1.1473 grm. Pd. = 1.1053 grm. Water-free, 
96.34 % Wfr. in Pd. 
Complete drying. — 1.1565 grm. Pd. = 1.0245 grm. Water- free, 
88.56 % Wfr. in Pd. J 
.23.56 % Pd. in Fr. X 92.45 % Wfr. in Pd. = 21.78 % Wfr. in Fr., or 78.22 % Water in Fr. 
Nitrogen. 0.4792 grm. Pd. = 0.4430 grm. Wfr., gave 0.06574 grm. N. = 14.84 % N. ) Av’ge 14.82 % N. in 
0.4829 =0.4465 0.06622 =14.80 $ Wfr. or 3. 23% N. in Fr. 
Ether Ext. 0.9960 grm. Pd.= 0.9210 grm. Wfr., gave 0.0265 grm. Ext.=2.87 % Ext. ? Av. 2.85% Ext.in Wfr. 
0.9995 =0.9243 0.0261 =2.83% 5 or 0.62 % Ext, in Fr. 
Ash. 3.073 grm. Pd. = 3.056 grm. Wfr., gave 0.178 grm. Ash = 5. 82 % Ash in Wfr. or 1. 27 % Ash in Fr. 
P 2 O s . 1.0187 grm. Pd. = 0 9418 grm. Wfr., gave 0. 0200 grm. P 2 0 5 = 2.13 % P 2 0 5 } Av’ge 2.15 % P 2 0 5 in Wfr. 
1.0910 =1.0083 0.0219 =2.17' $ or 0.47 % P 2 O s in Fr. 
S0 3 . 1.000 grm. Pd. = 0.8936 grm. Wfr., =0.0192 grm. S0 3 =2.15 % S0 3 ? Av ? ge 2.19 % S0 3 in Wfr. 
1.0015 =0.8949 =0.0199 =2.22 > or 0.47 % SC 3 in Fr. 
Albumen ( 33.3 grm .F r . = 7.26 grm. Wfr., gave 0.5305 grm. Alb.=7.30 % Alb. ? Av’ge 7.30% Alb in Wfr. 
water Ext t' 33 - 3 =7.26 0.5310 =7.31% £ or 1.59 % Alb. in Fr. 
Extractives , etc., in cold-water Ext. 33.3 grm. Fr. = 7.26 grm. Wfr., gave 0.8855 grm. Ext. containing 
0.267 grm. ash =0.6185 grm. water and ash-free Ext. = 8.52 % Ext. in Wfr. 
33.3 grm. Fr. — 7. 26 grm. Wfr. gave 0.841 grm. Ext. containing 0.242 grm. ash. = 0.599 grm. water and 
ash-free Ext. =8.25 % Ext. in Wfr. Av’ge 8.38 % Ext. in Wfr. or 1.81 % Ext. in Fr. 
Gelatin in hot-water Ext. 33.3 gnh. Fr. = 7. 26 grm. Wfr., gave 1.265 grm. crude gel. containing 0.056 
grm. ash = 1.209 grm. water and ash-free gel. = 16.65 % gel. in Wfr. 
33.3 grm. Fr. =7.26 grm. Wfr., gave 1.278 grm. crude gel. containing 0.056 grm. ash = 1.222 grm. water 
and ash free gel. = 16.83 % gel. in Wfr. Av’ge 16.74 % gel. in Wfr. or 3. 65 % gel. in Fr. 
Insoluble protein. 33.3grm. Fr. = 7.26 grm. Wfr., gave 4.555 grm. crude insoluble protein (“Ins.”) =62.74 
% crude Ins. in Wfr. 33.3 grm. Fr. = 7.26 grm. Wfr. gave 4.279 grm. crude Ins, = 58.94 % crude Ins. 
in Wfr. Av’ge 60.84 % crude Ins. in Wfr. or 13.25 Ins. in Fr. 
Recapitulation of analysis of flesh. 
I 
Constituents. 
Protein = N X 6. 25. 
Albuminoids esti- 
mated by difference. 
In water- 
free sub- 
stance. 
In fresh 
substance. 
In water- 
free sub- 
stance. 
In fresh 
substance. 
Water 
Per cent. 
Per cent. 
78. 22 
20.17 
0. 62 
1.27 
Per cent. 
Per cent. 
78. 22 
19. 89 
0. 62 
1. 27 
Protein 
Ether extract 
Ash 
Total 
92. 63 
2. 85 
5.82 
91.33 
2.85 
5. 82 
101. 30 
100. 28 
100. 00 
100. 00 
