44 The Eev. Sajiuel Haughton on the Solar and Lunar 



and calculated tides is also given, so as to afford a very good idea of the degree 

 of agreement between the observations and theory. 

 The constants of equation (2) are: — 



Lunar Diurnal Tide. 



1. Age of Tide. 



2. Lunitidal Interval = «„. 



3. Coefficient of Lunar Tide = M. 



Solar Diurnal Tide. 



4. Age of Tide. 



5. Solitidal Interval — i,. 



6. Coefficient of Solar Tide = S. 



These constants were found as follows, from the comparison of the observed 

 and calculated tides. 



1. The Age of the Lunar Tide was found from the comparison of the times 

 of vanisliing of the observed and calculated tides. 



2. The Lunitidal interval, = i^, was found from the equation, 



. . Range of Lunar Diurnal Tide at High Water 

 ^ "'^~ Range of Lunar Diurnal Tide at Low Water' ^ '' 



3. The Lunar coefficient, = M, was found from the equation, 



£\Ti/--c\/ 1 c\ . /(Range of Luniir Diurnal Tide at High Water)' /i\ 



231 sm 2 (max. value of /i) = V ^ ^^^^„^ ^f Limar Dim-nal Tide at Low Water)=- W 



4. The Age of the Solar Tide was not determined. 



5. The Solitidal interval, = z,, was found from the comparison of the solsti- 

 tial intersections of the observed Diurnal Tide with the calculated Lunar Tide. 



6. Tlie Coefficient of the Solar Tide, = S, was found from the equation, — 



2<S sin 2 (max. value of a) = Maximum Range of Solar Diurnal Tide. (5) 



I shall now proceed to the description of the Diurnal Tide at each Station, 

 and the results obtained from the comparison of the observed and calculated 

 tides, reserving for the conclusion of this Memoir some general reflections sug- 

 gested by the facts observed at the different Stations. 



