[9] CHEMICAL COMPOSITION AND VALUE OF FISH FOR FOOD. 239 
Nos. XLa, XLb, XLe, XL d, were sampled together and analyzed as 
No. XL. The same was done with XLIa, b, c, and d, which were ana- 
lyzed as XLI. 
No. XLII. Salt Mackerel (Scomber scombrus). 
Bought February 23, 1881, in Middletown, Conn., price 124 cents per 
pound, described as ‘No.1 mackerel”. Caught probably in September 
or October, as the barrel from which sample was taken was marked as 
inspected at Chatham, Mass.,in October. Weight of three fish at store a 
trifle short of 2 pounds; as received at laboratory, 857.8 grams = 1 pound 
14.3 ounces. As the fish had considerable adhering salt and brine, they 
were rinsed in cold water and dried between folds of paper and with a 
linen towel. The weight of the three fish thus treated was 781.4 grams. 
Accordingly the three fish had (857.8—781.4 =) 76.4 grams or about 9 
per cent. of adhering salt, brine, &c. Or, taking weight at store at 890 
grams, the adhering brine, &c., would be 109 grams, or about one-eighth— 
124 per cent. That is, one-eighth of the weight paid for at the store 
was brine, salt, &c., which would be rinsed off in preparing the fish for 
cooking. Such statements as this are of course of no importance except 
as data for calculating how much nutritive material is obtained ina 
given amount of the fish as bought. 
XLUI. Spanish Mackerel (Cybium maculatum). 
Sample received from Mr. Blackford, March 1, 1881. It was rather 
“ soft”, though entirely free from offensive odor. One whole fish weighed 
1,513 grams=3 pounds 5.3 ounces. 
XLIV. White Perch (Morone americana), 
Sample received from Mr. Blackford, March 1, 1881. The fish con- 
tained considerable spawn. The proportions of flesh and refuse in two 
whole fish were: 
a | b 
PH GTDC POL GION Se nla sa crelaicicice seine aelelmrn aim elaiecioin tai ste tenia latte grams.. 128.7 142.7 
OTT SOW ee nea crn me Saas nee aes Rice we Gta islarseis mi stanele cinia eToleme epamiciersleraelee OOzsss 208. 0 279. 0- 
GOSS MINING CAMINO) Neale sk laicsieiaieiseiniais sete <yors asie aoe ian aieaie nial es ee dos-~. 6.7 5.0 
Motaliweioht 2. ch2t deccancte ces coe tace cose sismacecemee sascicccice do.. 343. 4 426.7 
EDO LAL W GION Ue dere cee cmin also clos —eteacie ss SSR eee Es Shoe cera ounces. 12.1 15. 0 
XLV. Muskallonge (Hsow nobilior). 
From Saint Lawrence River. Received March 4, 1881, from Mr. Black- 
ford, who says that it “is not often found in our markets.” One whole 
fish weighed*4,118 grams=9 pounds 1.2 ounces. 
XLVI. White Perch (Morone americana). 
Received March 8, 1881, from Mr. Blackford. Proportions of flesh 
and refuse in four whole fish as follows: 
| a b | c | d 
els POLWONE Hewas seis taek sel ee sss cen tas seen Sccess sachs re 78.7 | 110.6 78. 0 | 71.9 
DUS ee eee eee cae tela a Bee ek ae Aas Saoween eSaemoaee eee 129.2 | 196.5] 127.2 125.5 
ossyimoloaning seepeee: meee e tenet ce ea ee aoe kmeoa cece cena do. Til 4.6 3531) 3.3 
Total Weight -.-. 2.02. ----22-- 222 nn nnnn ne ene ecseoe ee ee do.. 215.0 | 311.7] 208.5 200.7 
Total weig FE Ria et pe Be ene eta a a ounces. 7.6 11.0 7 7.0 
