0)1 Mean Sea Level and its Fluctuations. 



27 



spondence. Except for the year 1906 (where a secondary maximiiin 

 is apparent in the foreign data but not in those for Aberdeen) the 

 two curves run close and parallel. The main phenomenon is evidently 

 a nearly uniform one over the area, or great part of the area, of the 

 North Sea and Baltic. 



As far as I can judge, however, from the data given by Dr. Brehmer, 



FEET 



■2 

 ■15 



•I 



■05 







—05 



—I 



-■15 



J I L 



Fig. 9. — Annual Mean Sea Level at Dundee and Aberdeen (1897-1913). 

 (Dotted line, Aberdeen.) 



1900 01 02 03 04 05 06 07 08 09 



CM 



Fig. 10. — Annual Mean Heights (compared with 

 the mean of the Avhole ])eri<Hl) of J\!can Sea 

 Level at German and Danish Poits, and at 

 Aberdeen (dotted line) (1900-1909). 



the same close comparison would not hold for the Dutch ports. Here 

 the highest values of mean annual sea level would seem to have been 

 reached in 1905, 1906. It is quite possible that another influence 

 entered in those years by way of the English Channel, which did not 



