Chap. XIII.] THE TIDES. 'i^>7 



tilde ', for the tide travels down each meridian from 

 the poles to the equator in about six hours. This 

 convergence should be most apparent in high latitudes, 

 in which the change in velocity of rotation is most 

 rapid. And, in fact, it seems to be indicated in the 

 North Atlantic by a southward course of the tide to 

 the North of Scotland and Labrador, coalescing with 

 the eastward course through the temperate zone ; 

 and in the South Atlantic by the northward course 

 alono; the coast of Pataffonia of the tide which meets 

 that coming down the coast of Brazil from the equa- 

 torial regions. 



In the eastern part of the Pacific this converging 

 action is sufficiently indicated by the extract on page 

 153 in which Admiral Fitzroy argues against the 

 course of the tide-wave being from south to north ; 

 for the preponderance of the eastward action in both 

 of the temperate zones seems simply to make the 

 convergence of the tides towards the equator more 

 rapid than it would otherwise be, due allowance being 

 made for the direction of the coast-line. 



Throughout the Great Southern Ocean the motion 

 along the meridians towards the equator is clearly 

 indicated on Dr. Whewell's chart of co-tidal lines ; 

 and though that chart professes to show a westward 

 motion in the Great Southern Ocean to be the source 

 of the North Atlantic tides, it gives evidence of the 

 opposing motions of the tides westwards in the equa- 

 torial regions and eastwards in higher latitudes. 



