100 



The Rev. Samuel Haughton on the Solar and Lunar 



From which we obtain 



il/= 0-868 ft. 



Also, since the maximum value of the Solar Tide is 0-28 ft., we have, by 

 equation (5), 



Max. value of 2S sin 2o- = 0-56 ft., 

 and, 



5"= 0-383 ft. 



Combining these results, we have for the Tide Constants at Donaghadee: — 



1. Lunitidal Interval - 7* SS*". 



2. Solitidal Interval = 11'' 12"'. 



3. Age of Lunar Tide at High Water = 6'' 5". 

 Age of Lunar Tide at Low Water = 5'' 2*. 



4. Lunar Coefficient =: 0-868 ft. 



5. Solar Coefficient = 0-383 ft. 



6. Ratio of Solar to Lunar Coefficient, — 



or 4 = 0-441. 

 M 



The Theoretical Tides at Donaghadee were constructed with the forego- 

 ing Tide Constants, and compared with the Observed Tides, with the follow- 

 ing results: — 



Donaghadee Table A. 



Comparison of the Obseeved and Calcdlated Didenal Tides at Donaghadee at High Water; 

 Positive Heights for Sixteen and a half Lunations, commencing 1?,S0, September 29'' 5'' 5V", and 

 ending 1851, December 22'' 22* 24"'. 



