770 



HANSEN 



[chap. 23 



a 



♦tf 



*4 



"I 



-4 

 -6 

 -« 

 • < 



" e 



CJ 



'12 



H - 



-8 



■12 



-16 



-20 



*20 



i-lS 



*12 



■16 -12 -B -* 



Fig. 4. Ellipses of tidal currents (M2 constituent) in the South Atlantic 'Meteor'' Anchor 

 Station No. 36. Lat. = 28° 8'S., long. = 19° 21'W. (After Defant, 1932, Fig. 78.) 



Bureau in Monaco ; this institution publishes current hsts of all these harmonic 

 constants (at present from about 3000 places). 



The presently available data refer to harbours at the continental coast and 

 on islands. From the open oceans no harmonic constants are available. A small 

 number of observations is known from the shallow waters of marginal seas, but 



