50 



U. S. COAST AND GEODETIC SURVEY 



Page 



27. Summary of tide planes, Boston Navy Yard and Commonwealth 



Pier No. 5- 63 



28. Tidal harmonic constants, Boston Navy Yard and Commonwealth 



Pier No. 5 64 



29. Tidal data, Boston Harbor, 1847-1926 65 



30. Adjusted tidal data, Boston Harbor 67 



31. Current data from observations of C. H. Davis. 1847, 1848 68 



32. Current data from observations of H. Mitchell,' 1860, 1861, 1863 70 



33. Current data from observations of committee on Charles River Dam, 



1902 72 



34. Current data from observations of R. W. Woodworth, 1926 73 



35. Current harmonic constants, stations Wl, W16, and W37 79' 



36. Tidal currents, Boston Light Vessel 79 



37. Set of nontidal currents, Boston Light Vessel 80 



38. Currents due to wind, Boston Light Vessel 80' 



39. Current harmonic constants, Boston Light Vessel- _ 81 



40. Summary of data for surface currents 82 



41. Condensed current data for selected localities S9 



42. Temperature and density of sea water, Boston Navy Yard, 1863. _ 90 



43. Temperature and densitv of sea water. Commonwealth Pier No. 5, 



1921-1926 ; 90 



44. Temperature and density of sea water, Boston Harbor, 1926. _ _ 92 



Table 1. — Mean lunitidal intervals and duration of rise of tide, Boston Navy Yard 



» Records for year incomplete; see note 1, Table 2. 



Mean high-water lunitidal interval for entire series.. 

 Mean low-water lunitidal interval for entire series... 

 Mean duration of rise of tide for entire series. 



=11.44 hours 

 = 5.23 hours 

 = 6.21 hours 



Table 2. — Mean high and low water on original tide scale, Boston Navy Yard 



1 Records for year incomplete, the following months being represented; 1847, June to December; 1866, 

 January to September; 1867, August to December; 1902, February to December; 1903, January to August, 

 October to November; 1904, July to December; 1905, January, April to December; 1906, January to 

 August; 1908, January, April to November; 1909, March to December; 1910, March to December. 



The above heights are referred to the original tide scale on Dry Dock No. 1 at the navy yard. 



Mean high water from entire series =24.99 feet on original tide scale 



Mean low water from entire series =15.25 feet on original tide scale 



