Diurnal Tides on the Coasts of Ireland. 



81 



Diurnal Tide at Portrush — continued. 



From the data contained in the preceding Tables the Solar and Lunar 

 Diurnal Tides at Portrush were obtained separately, as before, and found to 

 give the following results : — 



I. — Diurnal Tide at High Water. 



1. Maximum value of Lunar Tide for Positive Heights = 0^22 ft. 



2. Maximum value of Lunar Tide for Negative Heights = 0-37 ft. 



3. Maximum value of Solar Tide =: 0^25 ft. 



4. Diurnal Soli tidal Interval = 11'' SO". 



5. Age of Lunar Tide = 5" 9". 



II. — Diurnal Tide at Low Water. 



1. Maximum value of Lunar Tide for Positive Heights -0^15 ft. 



2. Maximum value of Lunar Tide for Negative Heights =0^19 ft. 



3. Maximum value of Solar Tide =025 ft. 



4. Diurnal Solitidal Interval = 11* 30"". 



5. Age of Lunar Tide = 4" 19*. 



VOL. XXIII. M 



