96 



MR. AIRY ON THE LAWS OF THE TIDES 



Section XI. — Discussion of the height of mean water deduced from the analysis of in- 

 dividual tides ; with reference to difference of station, and to variations of the phase 

 of the moon, and of the declination of the moon. 



The mean heights (Aq) for each station, in the results of last section, were divided 

 into groups corresponding to large tides and small tides, the dividing places being 

 the same as those in section V., page 29, or following by two days the times when 

 the moon's hour-angle from the sun was S*", 9*", lo*", 21''. The means for each group 

 were taken, and then the mean of those means of groups belonging to large tides, and 

 the similar mean for small tides. The results are the following, the numbers for 

 Courtown being taken by anticipation from section XVII. : — 



