Tides in the Mediterranean and Adjacent Seas 



453 



The oldest observations of tides in inland seas are those of the large North 

 American lakes. Harris (1908, p. 483) has published the results of the har- 

 monic analysis of observations for four localities at Lake Michigan and Lake 

 Superior and has compared them with the results of the improved equilibrium 

 theory. The complete agreement shows that we have to do with actual as- 

 tronomical tides. Later on, Endros (1930, p. 305) has analysed the curves 

 of Lake Erie published in a paper of Henry. He found, besides the free 

 oscillations, both the M 2 and the S 2 tide in the observations at Buffalo at 

 the eastern end and in Amsterburg at the western end. High water occurred 

 in Buffalo at 3 h, in Amsterburg at 9 h, so that we have here indirect tides. 

 This had to be this way, because v is for M 2 and S», 115 and 119 respectively. 



Table 72. Tidal data observed in lakes and inland seas 

 (1) Harmonic constants for the Great Lakes (Harris. 1907). 



(2) Lake Erie (Endros). Amsterburg, west end : time of high water (local time for centre meri- 

 dians) for M 2 ; 8-5 h; for S 2 ; 8-6 h. 



(3) Lake Balaton (Endros). Time of high water at the Syzygies: east end Kenese. 9 h; wes 

 end Keszthely, 3h; amplitude 5-6£cmfor both ends. 



(4) Lake Baikal (Sterneck). Penrschannja Bay (52 3 15'N., 10543'E.). 



