SEWAGE CONTAMINATION OF OYSTER BEDS. os 
Taste XI.—Analysis of oysters from the Bullock Neck oyster beds. 
Red colo- 
Specimens and date of collection. ei id pret B. coli. eee 
| tose agar. 
Oysters, October 17, 1901. 
MPRGLELIOO meee aneno tinge sense vais taiwae cicada dace cceeed + tn} =! 7 Al eet eles 
EPUIUEL AO oe Saarinen arenas os San aoe oo eines eneacee + a) se gltecnecseeaee 
PI RELOU epee tee cits Skee tees neem ae teae aewe de cdcewe cca a (tt) =i Altea cere 
AeA ESEEC ees Ios sate Sa asian epee sos omioetedede ede duais 4. (a) + ososisle ae 
2, UCD 34056 pe SUD SEGRE Oe SEE eO ee See eae eee : ote (@) a? Slewescie eee 
MPBICORUN Cie Seo acscewaes oss bes Seas eeoe sida de cence | 4 (a) oe el ees Se 
ERR MUCEULENC RISA Se eco lais wie sree oes eb sella wctdetise couite 4 (a) Ht © Eee eet 
PePERILCA DUNG eee piraecee aecic / dnoen Pe «cdiciiawsd tacos _ (@) eRe epee ey ese ee Ne 
PIMEB MRR ORSE RVG Fore ateor hoe ats a in eee cnc ere te olor ee oeietaee + (a) + sea EE 
Ey RMP EERCOHURENO ass cess oon mare cee sales anemic alcialororlonicaeeeeeee 4- (a) i Bis Sen ccre 
‘Oysters, October 23. | 
MBA HERT OC Otero ratatsicigaes Sai outs SE chs Ors Bos See 4 + a _ —s 
ELC OPN As cet Sep Says clo arn ae te aoian Noida noe we eben a + “pe Sls 
BY) IGE AS) 355 aaa el i ee aE eer ere ee ee ee + + “ei loslgaceeeee 
Gl, TUTTO RSE See Sasa ee ee or ees eee + + = | Fhe hase ee 
DEO Ce ees oan eee ce oe ae neo Sate oem eels _ = Ree ee 
AR BERHOS HMELO we eta <a inis sais ierocineie ee ate oe bee cidea aieloic + + en | eee oe 
2. Imtestime ...........- SS ase Se ones Oe ieee — + aA ER ea eon 
OaBERDLCHUREEE I oy ope eee tae ne ante seis sabe eis iso a Emme cen a oS = ac ase eh 
i IRC SI a ee Chor Mn lee ASA Sa Aree Oe ee — + ea | eee ee eee 
Sp HENGHOIND go aehed desc se scuS ceeds saan soccecsen ce BeEs 4+. + = agleceeteecenic 
Oysters, October 30, 
ils, RET ECV SB ete Ie eee ee aera aera OnE BE + + — s 
fey. ANTES. 6 HOSS eee eo ee ee oe ee eee eee a — =) Sea ie oe 
a. LUE OS ee = Se SOG aS ROSS eEE en tetera Se + SS Bilitces cee eeecc 
Gh ERE) eS cog oa aoe 6 Baas Te earn an oe pee ree + + aie eb Seeeeeiae Sane 
By LES a SE ed ea as ee en tele a - + ra Parca > See 
PRL CNUEIO ea eee See ee canes ee Shas Moca actasee ses + + etre «Sc cee eee 
ZO RASS |G nee ee ees ere ae ee en eee - Fo wit | Eee, eee 
eMC ULE ee ae erate ere oS ese olin oe nc cicbiome oer -- + <-> 8S eee 
SPBUMECSEIM CR reece en oe vets rot cdma Sowa ae nae Samnee a -- —y Wigliccssoceeeoee 
OMPLTULe SHIN eRe ae sete eee ee a ey ane Soe Ba + _ ==" | hl Saaseneeee 
a Not made. 
ZB. coli was found in a very large number of oysters, clams, and 
mussels taken above Bullock Neck, while only 8 of the 15 specimens 
taken from this (Bullock Point) bed were found to be infected. The 
organism was occasionally found in the juice of oysters whose intestines 
did not contain it. While nearly all the shellfish from Fields Point 
and Pawtuxet contained 2B. coli and other fecal bacteria, and while 70 
per cent of the oysters from the Sabins Point bed were found to be 
infected, about 53 per cent of the specimens taken from the Bullock 
Point bed, 4 miles below the main sewer outlet, contained the colon 
bacillus. 
The next lot of oysters was obtained from the bed off the northera 
shore of Conimicut Point, which, as already stated, is 54 miles below 
Fields Point and is planted in from 6 to 18 feet of water. Twenty- 
five oysters from this bed were opened and examined, with the follow- 
ing results (p. 224), cultures being taken from the intestines only of 
these specimens. 
