116 The Rev. Samuel Haughton on the Solar and Lunar 



Diurnal Tide at Courtown — continued. 



On proceeding to calculate, from the preceding .Table, the Diurnal Tide 

 Constants at Courtown, I found that it ■was impossible to construct satisfacto- 

 rily the Diurnal Tide at Lo-w Water. The Equinoctial Lunar Tide at Low 

 Water was ± 0-25 ft.; and this value was the same for the Spring and Autum- 

 nal Equinoctial Tides ; but on constructing the Tides from the Spring Equi- 

 noctial Tide, I could not reconcile it with the Autumnal Tide, and vice versa. 

 I, therefore, abandoned tlie attempt to reconcile Theory and Observation with 

 respect to the Tide at Low Water at this Station, and have only used the Lunar 

 Equinoctial tide in height, which was found to be accurately tlie same in amount 

 at both Equinoxes: — 



L — Diurnal Tide at High Water. 



Maximum value of Lunar Tide for Positive Heights = 0^40 ft. 



Maximum value of Lunar Tide for Negative Heights = 0'40 ft. 



Maximum value of Solar Tide =0'30ft. 



Diurnal Soli tidal Interval = 5'' l". 



Age of Lunar Tide = <d'^ 22*. 



1. 

 2. 

 3. 

 4. 

 5. 



XL — Diurnal Tide at Low Water. 



1. Maximum value of Lunar Tide for Positive Heights = 0'25 ft. 



2. Maximum value of Lunar Tide for Negative Heights =0^25 ft, 



3. Maximum value of Solar Tide = 0^30 ft.? 



4. Diurnal Solitidal Interval = S* 1""? 



5. Age of Lunar Tide = 3'' 12*? 



