SEWAGE CONTAMINATION OF OYSTER BEDS. — 203 
varying in depth from 6 to 20 feet at low tide. Below Conimieut 
Point the river is fully 3 miles in width, and has free communication 
PROVIDENCE RIVER 
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NARRAGANSETT BAY 
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with both the Eastern and Western passages of the bay, insuring a 
good circulation of water at all times; but above this point it is scarcely 
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