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BULLETIN OF THE BUREAU OF FISHERIES 



stations 39 and 40), or at the outernaost station, on the other {Acadia station 44). ^° 

 It is doubtful how regularly profiles abreast of the gulf or off southern New England 

 would show this decrease in density seaward from the continental slope. 



In the preceding discussion I have taken pains to speak always of a "dynamic 

 tendency" toward movements of the water, never of such movements as taking place; 

 because in our latitudes the currents that actually follow inequalities of density 

 of this sort are given quite different characters by the deflection resulting from the 



Meter 



Fia. 170.— Density along a cross profile of the western part of Georges Bank, July 20 and 21, 1914 (stations 

 10215 to 10218). Corrected for compression 



rotation of the earth, by which the apparent track of any current (or other body 

 moving freely over the earth) in the Northern Hemisphere is deflected to the 

 right. *° 



The r61e that this quasi-force plays in directing the ocean currents, however set 

 in motion, is now so generally appreciated that no discussion of it is called for here. 



•• None of our Orampus or Alhalross profiles have run out far enough to show this relationship, if it existed. 



" Kriimmel (1911, p. 449) and Sandstrom (1919) have given perhaps the simplest statements of this subject, in Its oceano- 

 graphic bearing, and discussions of the effects of the centrifugal force resulting from the earth's rotation in relation to the ellipsoid 

 form of the earth. See also Ferrell (1911), Davis (1885 and 1904), and Bjerknes (1910 and 1911). 



