58 U. S. COAST AND GEODETIC SURVEY 



Table 13. — Mean high water above sea-level datum, Commonwealth Pier No. 6 



November. 

 December. 



4.84 

 4.56 



Feet 

 4.29 

 4.42 

 4.57 

 4.66 

 4.61 

 4.79 

 4.82 

 4.83 

 4.77 

 4.76 

 4.74 

 4.53 



Feet 



4! 54 

 4.64 

 4.74 

 4.72 

 4.79 

 4.65 

 4.60 

 4.50 

 4.58 

 4.78 

 4.58 



Feet 

 4.32 

 4.73 

 5.06 

 4.78 

 4.78 

 4.68 

 4.60 

 4.68 

 4.79 

 4.71 

 4.65 

 4.38 



Feet 

 4.48 

 4.42 

 4.32 

 4.47 

 4.54 

 4.63 

 4.68 

 4.70 

 4.73 

 4.66 

 4.51 

 4.51 



Feet 

 4.22 

 4.78 

 4.36 

 4.50 

 4.55 

 4.61 

 4.70 

 4.81 

 4.64 

 4.63 

 4.35 

 4.47 



Feet 

 4.38. 

 4.68 

 4.69' 

 4.63 

 4.64, 

 4.70 

 4.69 

 4.71 

 4.70 

 4.68 

 4.65 

 4.61 



4.65 



4.64 



4.55 



4.55 



4.62 



Above table is derived by referring the values in Table 12 to the sea-level datum defined on p. 41. 

 Table 14. — Mean low water on tide staff, Commonwealth Pier No. 5 



The above heights are referred to the tide staff installed in September, 1922, the zero of which is 21 45 feet 

 below bench mark 7. 



Table 15. — Mean low water below sea-level datum, Commonwealth Pier No. 6 



Above table is derived by referring the values in Table 14 to the sea-level datum defined on p. 41. 



