914 REPORT OF THE COMMISSIONER OF FISHERIES. 
Though the river below Bullock Neck does not have the appearance 
of a sewage-polluted stream, it is possible to isolate 2. coli from some 
samples of water taken from it. A smaller percentage of the samples 
co'lected about Conimicut and Nayatt points than of those collected 
nearer the sewer outlet give tests for this organism; it was found in 
59 per cent of the water samples taken in the neighborhood of Bullock 
Neck; in 50 per cent of those collected over the Conimicut beds; and 
in but 31 per cent of those obtained from the Nayatt ground. It is 
very evident that the tides play an important part in the purification 
of this section of the river. Most of the samples which gave positive 
reactions for /. coli were collected on a falling tide. Samples taken 
on the flood are, in many cases, free from sewage bacteria. 
Here, then, 1s an area from 3 to 6 miles distant from the chief sources 
of pollution, in which the sewage, when present, is diluted to such an 
extent that examination often fails to reveal the presence of fecal bac- 
teria in 1 c. e. samples. 
Below Conimicut Point, in the broader expanse of the lower river, 
five stations were located over the extensive Rocky Point oyster 
ground. These were situated as follows: Station 1, over the northern 
portion of these grounds, 6 miles below Fields Point; station 2, about 
half a mile farther south, near channel buoy No. 9; station 8, just 
north of Rocky Point; station 4, south of Rocky Point; and station 
5, over the southern areas of this ground, which is about 84 miles south 
of the Fields Point sewer outlet. 
A single trip was made to the Warren River in October, 1902, and 
samples collected at five stations about half a mile apart. Station 1 was 
located at buoy No. 1, marking the entrance to Warren River channel, 
which is in reality in the Providence River, about half a mile directly 
south of Rumstick Neck; station 2 directly in the entrance to the 
Warren River, half a mile above station 1, and so onuptheriver. At 
this time samples were collected at a station, No. 6, in Providence 
river, located at buoy No. 7. These samples were taken because this 
locality is swept by any tidal currents that may come from the Warren 
tiver on ebb tide, and it was desired to ascertain whether pollution 
from this stream was noticeable in the Providence River at that point. 
Tables V and VI give in condensed form the results of the analysis. 
