222 



EEPORT OF THE COMMISSIONER OF FISHERIES. 



Fields Point, contained B. coll, either in the juice or in the intestines. 

 In one case the stomach was found sterile; in another, the stomach 

 tests did not g-ivc the reactions for this organism; in a third, however, 

 B. coll was isolated from tubes inoculated with material from the 

 stomach. The bacillus was not found in the rectum of the one oyster 

 examined in this respect. Bad. lactis aerogenes and B. sporogenes 

 were observed in the tests from the juice and intestines of a number 

 of the specimens. 



The majorit}' of the 03- sters, clams, and mussels taken from the Prov- 

 idence River at a distance of about 2 miles from the sewer outlet con- 

 tain evidences of sewage pollution. As miglit be expected, however, 

 fewer samples from the eastern side of the river than from the western 

 were found infected. About 70 per cent of the oysters from the 

 Sabins Point bed contained B. coll, while practically all of the clams 

 and mussels from Pawtuxet were contaminated. 



The next batch of oysters examined was obtained from the Bullock 

 Neck ground off the eastern shore of the river, not far from the Bul- 

 lock Point light, about 4 miles below Fields Point. These oysters 

 were dredged in from 18 to 20 feet of water and were obtained fresh 

 from the boats working over the beds. Three lots were taken from 

 this localitj^; in all 15 oysters were examined. Table XI is "a record 

 of this analysis. 



Table X. — Analysis of oi/sters from Sahins Point beds. 



Specimens and date of collection. 



Dextrose 

 fermented. 



Red colo- 

 nies on lit- 

 mus lac- 

 tose agar. 



B. coli. 



Other fecal 

 bacteria. 



Oysters, April 19, lii feel of imter. 



Juice 



Juice 



Juice 



Intestine . 

 Intestine . 

 Intestine . 

 Intestine . 

 Intestine . 

 Intestine . 

 Intestine 

 Intestine . 

 Intestine , 

 Intestine - 



Juice 



Juice 



Juice 



Juice 



Intestine , 

 Intestine . 

 Intestine . 

 Intestine , 

 Intestine . 

 Intestine . 

 Intestine , 

 Intestine . 

 Intestine , 

 Intesit.ine 

 Stomach . 

 Stomach 

 Stomach 

 Rectum . 



Oysters, May 20. 



+ 

 + 



+ 



+ 



No growth, 



-t- 



(") 

 (") 

 CO 

 {") 

 ('«) 



+ 

 + 

 + 

 + 



a Not made. 



