‘ 
252 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [22] 
No. LXIX. Boston Bay, Mass. 
Received from Messrs. Bunting & Warren, May 5, 1881. 
No. LXXVI. Canned Lobster. 
Purchased in Middletown, May 26,1881. The can was labelied “ Thur- 
ber’s Egmont Bay Fresh Lobster,” H. K. & F. B. Thurber & Co., New 
York City. Ina letter Messrs. Thurber & Co. say: “Sample was packed 
by Castine (Maine) Packing Company. The sample consisted of a pound 
can, the contents weighing 469.5 grams, or 1 pound 0.5 ounce. 
CRAY FISH (Cambarus). 
No. LXIV. Potomac River, Virginia. 
Furnished by Mr. Blackford, April 26,1881. The animals were whole, 
but only the tails were used for analysis, as this is the portion ordinarily 
eaten. 
The weights of the different portions in the whole 21 samples were: 
Cray fish, entire. Grams. 
plat) ieee ete ote is aia wie soe Cine oslo ele ets ninipars Soe nininjae cciomieleisre <toig Bee ain sic cae al ante ois aint anette 176.6 
BOUL OSH ee nen eta see nicics sce oes aan isisecierccte ce clos ces swam eeincinne Soee aoe ceraae teens aceite meen 508. 0 
MOSSUINClOAMIN Gr cach cep ocies emia soe S Sabina = me ehiea' asec eae ne eee ees == eeee see eee 10. 4 
POCA ere tcc os oes camnianisisjse Aas vniels celels © eee dela elec ns ice ape te See ne eee eee ee 695. 0 
TAILS. 
GUD IOMD OLGON: oaccte psisrss oscisinle sooo Swicit wales cea seaweetsaascewes eee eects tee eee cerns 85.5 
NRG LUIS OMG oe cites eae oars See oern a= Se eas dais\rsmujacle eslow'ae 5c Se ORO ee ee EE eee eee 83.8 
OSSHMepreparin for, ANALY SiSisesees oe ss false ee es Sk ne ee Sa re me erage ie are 7.6 
MO GAM a sates cicle clon S siore ons dae So Mncamet amma niece ee cake oe RE EE Ee eee Senet nee See eee 176.6 
Thus while the edibie portion makes nearly 50 per cent. of the part 
taken for food, it is only 12.3 per cent. of the whole animal. 
PREPARATION OF SAMPLES FOR ANALYSIS. 
The oysters were, with the exception of the “ cove” or canned oyster, 
all received in the shell. All adhering foreign matters—as mud, sea- 
weed, hydroids, gasteropods, &c.—were removed by thorough washing. 
The oysters were then allowed to drain, wiped, and weighed. The 
weighed oysters were opened, the liquid thus escaping being caught in 
a large evaporating dish. The oysters after being opened were put upon 
a porcelain colander (“crystal drainer”), and allowed to drain into a 
beaker. In this way some very small particles of solid matter would 
probably be added to the filtrate. For the purposes of analysis we have 
called the part remaining upon the perforated dish “flesh,” and the fil- 
trate “liquids.” The flesh and liquids in the cove oyster were separated 
in the same way. After this separation the flesh was chopped in an 
ordinary wooden tray till the sample was quite fine, and evenly and 
thoroughly mixed, as was done with the samples of fish reported by 
Professor Atwater. 
