CO 



Mean Salinity Curves 

 Monthly mean salinities in parts per thousand are presented graphically to show the seasonal variation. 



%^ JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC. Xo JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC. 

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WOODS HOLE, MASS. - 



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BREAKWATER HARBOR, DEL. 



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PHILADELPHIA, PA. 



