and, 



Diurnal Tides on the Coasts of Ireland. 91 



also, since the mean value of the Solar Tide is 0-275 ft., we have, 



Max. value of 25 sin 2(7 = 0-550 ft., 



5=0-376 ft. 



Combining the foregoing results, we find for the Tide Constants at Cushen- 

 dall :— 



1. Lunitidal Interval = 7" 16'". 



2. Solitidal Interval = 11" 25™. 



3. Age of Lunar Tide at High Water = 6" 18* 41"'. 



Age of Lunar Tide at Low Water = 5" 2* 45" 



4. Lunar Coefficient = 0-881 ft. 



5. Solar Coefficient = 0-376 ft. 



6. Eatio of Solar to Lunar Coefficient, 



or ^=0-427. 

 M 



The Theoretical Tides were constructed with the foregoing Constants, and 

 compared with the observed Tides. The results of this comparison are con- 

 tained in the following Tables: — 



CnSHENDALL TaBLE A. 



Comparison op the Observed and Calculated Diurnal Tides at Cushendall at Hirjh Water; 

 Positive Heights for Thirteen Lunations, commmcing 1851, January i'' 22* 33'", and ending 1851 

 December 23'' 9'' 54'". 



N 2 



