TIDES AND CURRENTS IN BOSTON HARBOR 



55 



Table 6. — Monthly extreme low water below sea-level datum, Boston Navy Yard- 

 Continued 



1867: 

 Aug. 31. 

 Sept. 1.. 

 Oct. 17- 

 Nov. 15. 

 Dec. 13.. 



Height 



Lowest.. 

 Average. 



Jan. 9 



Feb. 10 



Mar. 9 



Apr. 6 



May 25 '. 



June 25 



July 22 



Aug. 19, 20. 



Sept. 17 



Oct. 17 



Nov. 12 



Dec. 30 



Lowest 



Average 



Jan. 29 



Feb. 27 



Mar. 27, 29. 



Apr. 26 



May 27 



June 24 



July 12, 13.. 

 Aug. 9, 10... 



Sept. 7 



Oct. 5 



Nov. 3 



Dec. 1 



7.8 

 6.9 

 6.4 

 7.1 

 7.0 



7.8 

 7.04 



Lowest. 



Jan. 1 



Feb. 17 



Mar. 20 



Apr. 17 



May 16 



June 14, 15.. 



July 11 , 



Aug. 28 



Sept. 26, 27. 



Oct. 25 



Nov. 24 



Dec. 22 



Lowest-. 



Average. 

 1871: 



Jan. 22 



Feb. 11--.. 

 Mar. 9, 11.. 



Apr. 7 



Mays 



June 3 



July 3 



Aug. 2,3... 



Sept. 1 



Oct. 15 



Nov. 12.... 

 Dec. 12 



Lowest.. 



Average. 



1872: 



Jan. 12 



Feb. 8 



Mar. 24.... 

 Apr. 25, 28. 



May 24 



June 22, 23. 

 July 21, 23. 



Aug. 20 



Sept. 17.... 

 Oct. 25, 27.. 

 Nov. 17, 21. 

 Dec. 29, 30. 



Lowest 



Average... 

 1873: 



Jan. 30.. 



Feb. 26 



Mar. 27 



Apr. 28 



May 26, 27... 



June 13 



July 13 



Aug. 10 



Sept. 7 



Oct. 7 



Nov. 3,4 



Dec. 3 



Height 



Lowest 



Average 



1874: 



Jan. 18 



Feb. 18,19.... 



Mar. 21 



Apr. 19 



May 15, 16, 17. 



June 14 



July 31 



Aug. 28,29.... 



Sept. 27 



Oct. 26- 



Nov. 24 



Dec. 25 



6.4 

 6.6 

 7.0 

 6.8 

 6.8 

 7.0 

 7.0 

 7.2 

 6.3 

 6.4 

 6.4 

 7.3 



7.3 

 6.77 



7.6 

 7.0 

 7.5 

 6.9 

 6.3 

 6.5 

 7.1 

 7.2 

 7.3 

 6.8 

 7.4 

 7.3 



7.6 

 7.08 



1876: 

 Oct. 16.. 

 Nov. 4-. 

 Dec. 16. 



Lowest 



Average 



Jan. 12 



Feb. 12 



Mar. 12 



Apr. 29 



May 28, 29, 30. 

 June 26, 27.... 



July 27 



Aug. 23 



Oct. 21 



Nov. 7 



Lowest.. 

 Average. 



1904: 

 May 1 



July 15, 16. 

 Aug. 13.... 

 Sept. 11.-.. 



Oct. 9 



Nov. 7 



Dec. 29 



Lowest.. 

 Average. 



1905: 

 Jan. 23... 

 Mar. 23.. 

 Apr. 20.. 

 May 19.. 

 June 17.. 

 July 16.. 

 Aug. 4... 

 Sept. 30. 

 Oct. 28- 

 Nov. 27.. 

 Dec. 25.. 



Lowest_. 

 Average.. 



1906: 



Jan. 24 



Feb. 12 



Mar. 13 



Apr. 12 



May 11 



Junes, 9-.. 



July 6 



Aug. 4 



Sept. 2 



Nov. 17, 19. 



Lowest.. 

 Average.. 



Jan. 4 



Apr. 3 



May 17.... 



June 17 



July 17..... 

 Aug. 13... 

 Sept. 8, 11. 



Height 



Feet 

 7.2 

 6.2 



7.8 



7.S 

 6.96 



8.1 

 8.1 

 7.0 

 6.4 

 7.0 

 6.8 

 7.2 

 7.0 

 6.6 

 6.9 



8.1 



7.11 



7.6 

 7.14 



7.9 

 7.23 



1908: 

 Oct. 11. 

 Nov. 9., 



Lowest.. 

 Average.. 



Mar. 22, 23, 24. 



Apr. 22 



May 20 



June 16 



July 6 



Aug. 3- 



Sept. 2 



Oct. 29 



Nov. 26 



Dec. 25 



Height 



Feet 

 6.8 

 6.7 



8.0 

 7.00 



6.8 

 7.0 

 7.0 

 6.7 

 7.3 

 7.8 

 6.5 

 7.4 

 7.1 

 6.1 



Lowest... 

 Average.. 



1910: 



Jan. 11 



Feb. 24, 27.. 

 Mar. 11, 12. 



Apr. 11 



May 11 



June 9 



July 6 



Aug. 23 



Sept. 22, 23. 



Oct. 20 



Nov. 17 



Dec. 16 



Lowest.. 

 Average. 



1911: 



Jan. 16 



Feb. 11, 12, 13. 



Mar. 16 



Apr. 29 



May 1 



June 27 



July 26 



Aug. 24 



Sept. 23 



Oct. 10 



Nov. 8 



Dec. 7 



Lowest 



Average 



Monthly aver 

 ages for entire 

 series: 



January. 



February... 



March 



April 



May 



June 



July 



August 



September. 



October..., 



November.. 



December 



Average for 

 series.. 



7.8 

 6.97 



6.6 

 5.8 

 6.4 

 6.7 

 7.5 

 6.8 

 6.8 

 6.4 

 6.0 

 6.6 

 7.0 

 7.5 



7.5 

 6.68 



6.7 

 6.1 

 7.1 

 7.0 

 6.9 

 7.0 

 7.0 

 7.1 

 6.3 

 6.5 

 6.7 

 7.3 



7.3 

 6.81 



7.17 

 7.21 

 7.30 

 7.12 

 7.02 

 6.92 

 6.93 

 6.90 

 6.73 

 6.98 

 7.08 

 7.18 



Lowest tide of these observations was 8.4 feet below the sea-level datum and occurred Feb. 27, 

 The heights in the above table are referred to the sea-level datum defined on p. 41. 



