TIDES AND CUKRENTS IN BOSTON HARBOR 59 



Table 16. — Mean range of tide, Commonwealth Pier No. B 



Values in above table are difEerences between the mean high and low waters for each month as obtained 

 directly from the observations. For mean range corrected for longitude of moon's node, see following table. 



Table 17. — Mean range corrected for longitude of moon's node, Commonwealth 



Pier No. 6 



The above table is derived from Table 16 by applying factors depending upon the longitude of the moon's 

 node. See p. 12. 



