Diurnal Tides of the Coasts of Ireland. 267 



Combining the foregoing results, we obtain for the tide con- 

 stants at Courtown, — 



1. Lunitidal interval ='0^ 28»'. 



2. Solitidal interval =5^ !■". 



3. Age of lunar tide 



at high water =6^ 22i>. 

 at low water =3<i 12^^. ? 



4. Lunar coefficient =0'719 ft. 



5. Solar coefficient =0-410 ft. 



6. Ratio of solar to lunar coefficient, 



or ^ =0-570. 



The theoretical tides at high water were constructed with the 

 foregoing constants, and compared, with the observed tides. The 

 results of this comparison are contained in the following Tables. 



Courtown Tide, Table A. 

 Positive heights at high water for fifteen and a half lunations, 

 commencing 1850, November 7^ 9'' 48"^, and ending 1851, 

 December 31 >! 14'^ 36>n. 



Courtown Tide, Table B. 

 Negative heights at high water for fifteen and a half lunations, 

 commencing 1850, November 7^ 9'^ 48™, and ending 1851, 

 December Sl^ 14'> 30'". 



T2 



