30 



Fishery Board for Scotland. 



Table N. — Harmonic Formulse for Annual Variation of Mean Sea 

 Level at Danish Ports, from Madsen and Petersen, 1914 (in cm. 

 referred to zero-level of Danish Geodetic Sm'vey, epoch January 15). 



I. Uncorrected. II. Corrected for influence of Wind. 



Lastly, we may attempt to compare the fluctuations at Milford 

 Haven (1886-1892) with those at Aberdeen. Here again there is, 



F^ET 



-IS 



Fig. 12. — Mean Sea Level at Milford Haven : annual deviation 

 from the mean of 1886-1892. The dotted line represents 

 the same data for Aberdeen, but for the years 1885-1891. 



at first sight, but little correlation. But if we imagine the Aberdeen 

 curve to be retarded a year in comparison with the Milford Haven 

 one, and compare the Milford Haven level in 1887 with that of Aber- 

 deen in 1886, and so on, then we find a curiously close agreement 

 between the two superimposed curves (Fig. 12). T do not think, 

 however, that the period available for comparison is long enough to 

 let us give very much weight meanwhile to this remarkable apparent 

 correspondence. 



To sum up, it is clear that the apparent fluctuations from year to 

 year in Mean Sea Level (as here defined) are not merely local pheno- 

 mena, but are similar in separate and distant localities. The similarity 

 between Dundee and Aberdeen (1897-1912) is close. The similarity 

 between these and the German and Danish Stations (1900-1909), 

 as given by Brehmer, is again close, though there are certain notable 

 differences, especially in the years 1905-1906. There is again a resem- 

 blance, in the most salient features of the curve, for the years 1887- 

 1900, between the observations at Kiel and those at our Scottish 



