Diurnal Tides on the Coasts of Ireland. 



137 



Age of Lunar Diurnal Tide. 



A striking feature of this Table is the fact, that the Age of the Tide deduced 

 from the observations made at High "Water is greater than the Age deduced 

 from the observations at Low Water, at all the stations, except Bunown, at 

 which the Ages deduced are equal. 



I am unable to explain this fact, but it clearly indicates a defect in the 

 Theory of the Tides, which would show the same Age to correspond with 

 either High or Low Water. 



Some very interesting inferences respecting the mean depth of the sea 

 follow, from comparing the Age of the Lunar Diurnal Tide with the Accelera- 

 tion of the Lunar Tide, given in the Table at p. 134. The following Table 

 contains the results of this comparison: — 



Mean Depth of Sea deduced from the Age of Lunar Diurnal Tide. 



VOL. XXIII. 



