66 U. S. COAST AND GEODETIC SURVEY 



Table 29.— Tidal data, Boston Harbor, 1847-1926— Continued 



Sta- 

 tion 



No. 



Observations 



Lunitidal 

 intervals 



Railroad bridge, Ne- 



ponset River (42° 17' 



N., 71° 02' W.) 



Moon Head (42° 19' 



N., 70° 59' W.) 



Boston Harbor, Southern 



Shore: 

 r Nut Island (42° 17' N., 

 L 70° 57' W.) 



Sheep Island, Hing- 

 hamBay(42°17'N., 

 70° 55' W.) 

 f Weymouth Fore Riv- 

 er Bridge (42° 15' N., 

 [ 70° 58' W.) 



Weymouth Back Riv- 

 er Bridge (42° 15' N. 

 70° 56' W.) 



Crow Point, Hingham 

 Harbor Entrance 

 (42° 16' N., 70° 54' 

 W.) 



Hingham, Hingham 

 Harbor (42° 15' N., 

 70° 53' W.) 



Strawberry Hill, Hing- 

 ham Bay (42° 17' N., 

 70° 53' W.) 



Year Length HWI LWI 



Boston Harbor, Western 



Shore— Continued. 



Commonwealth Pier [1922 



No. 5 (42° 21' N., 71° { to 



03' W.) [1926 



Castle Island (42° 20' (1892 



N., 71° or W.) ,11894 



1926 



(1915 

 n916 

 1926 



i8 days. 

 12 days. 



6 days- 



3 months. 

 6 months. 

 IJ 



4 days 



2 days 



7 days 



1 day. 



20 days 



1 day 



3 days 



11.56 

 11.49 

 11.37 



11.30 

 11.51 



11.41 



11.35 

 11.33 



Hours 

 5.04 



5.17 

 5.21 



5.42 

 5.26 

 5.17 



5.05 

 5.23 



Dura- 

 tion of 

 rise 



Hours 

 6.25 



6.20 

 6.20 



6.14 

 6.23 

 6.20 



6.15 

 6.18 

 6.05 



6.13 



6.30 

 6.10 



Feet 

 9.42 



9.41 

 9.59 



9.51 

 9.14 



9.21 

 9.51 



8.40 

 9.40 



9.52 



Compared with— 



Sandy Hook, N. J. 

 Fort Hamilton, N. 



Y. 

 Commonwealth 



Pier No. 5. 



Fort Hamilton, N. 

 Y. 



Portland, Me. 



Do. 

 Commonwealth 



Pier No. 5. 

 Fort Hamilton, N. 



Y. 



Do. 

 Commonwealth 



Pier No. 5. 

 Fort Hamilton, N. 



Y. 



Commonwealth 

 Pier No. 5. 



. 82 Fort Hamilton, N. 

 Y. 



For reference to the observations listed in this table, see p. l^ 



