90 



TIDES AND BENCH MAEKS 



The harmonic constants given below were obtained from the hourly heights 

 of the sea at Nassau, for the year beginning July 1, 1903, by a process essen- 

 tially similar to that outlined by Professor George H. Darwin, in the report of 

 the British Association for the Advancement of Science, for the year 1883. 

 The amplitudes {11) or semiranges of the components, and their epochs (k) 

 or component-tidal intervals expressed in degrees, as given in the table, have • 

 been corrected by a process for eliminating the small residual effect of one com- 

 ponent upon another. 



HARMONIC CONSTANTS. 

 From one year of hourly heights beginning July 1, 190:(. 



Symbol. Name of Component. so^arhour Amplitude. Epoch, 



H 



° Feet. ° 



Ji Smaller lunar elliptic diurnal ].-).58.i44.33 0.0169 118.73 



Ki Luni-solar diurnal 15.0410686 0.2848 120.50 



JC™ Luni-solar semidiurnal .■10.0821372 0.06.14 246.10 



La Smaller lunar elliptic semidiurnal .... 29.."'>28478s 0.04.")9 246.59 



Ml Smaller lunar elliptic diurnal 14.4920521 0.0144 101.97 



Ml Principal lunar series 28.9841042 1.2422 213. 3f 



Ml " " •■ 43.4761563 0.0067 153.7S 



^'. " " " 57.9682084 0.0171 65.31 



Ma " " ." 86.9523126 0.0039 279.15 



A'. Larger lunar elliptic semidiurnal 28.4397296 0.3026 190.54 



2N Lunar elliptic semidiurnal, second order 27.8933548 0.0402 167.70 



Oi Lunar diurnal 13.94.H0356 0.2138 124,06 



00 Lunar diurnal, second order 16.1391016 0.0092 116.94 



Pi Solar diurnal 14.9589314 0.0872 121.59 



Oi Larger lunar elliptic diurnal 13.3986609 0.0377 118.28 



20 Lunar elliptic diurnal, second order... 12.8542862 0.0056 127.59 



fin Smaller solar elliptic 30.0410686 0.0017 237.36 



Si Principal solar series 15.0000000 0.0104 171.96 



Sa " " " 90.0000000 0.0034 104.04 



®4 " " " 60.0000000 0.0044 318.81 



Ss " " " 30.0000000 0.2101 237.36 



T2 Larger solar elliptic 29.9389314 0.0124 237.36 



K„ Smaller lunar evectional 29.4356254 0.0087 224.51 



no Variational 27.9682084 0.0282 202.73 



Vi Larger lunar evectional 28.5125830 0.0675 189.28 



Pi Larger lunar evectional diurnal 13.4715144 0.0081 125.59 



8a Solar annual 0.0410686 0.3115 143.90 



Ssa Solar semidiurnal 0.0821372 0.1013 32.88 



The mean lunitidal intervals may be obtained from the harmonic constants 

 by the equations 



.Srpr/ = 0.0345 iMl~v) (1) 



LWI= 0.0345 {Ml — w) + 6.21h. (2) 



where HWI = mean high water lunitidal interval 

 " L1T7 = " low " 



and V and w are such that 



