338 



MR. THOMAS CARRICK ON THE 



uninterrupted ocean-spaces all round. In a perfectly cir- 

 cular area of this kind, the differential action would have 

 points of maximum and minimum effect on opposite shores 

 at every instant ; these together forming a nodal line, both 

 ends of which would move simultaneously round the coast 

 as the moon moved across the heavens,, the wave of high 

 water being everywhere the instantaneous expression of the 

 differential force at its nodal point of maximum action. 



On the accompanying maps of the world and of the 

 British Islands (see Plates Nos. XI. & XII.), the land- 

 areas which approach nearest to the prescribed condition 

 are enclosed within one or more circles intersecting the 

 salient parts of the coast. 



Taking the northern hemisphere first, the circle round 

 the North American continent necessarily excludes the 

 southern part from Yucatan to the Isthmus of Panama, 

 as well as the Russian territory in the north-west, and the 

 promontory of Greenland on the north-east. 



The hours of high water at places upon or adjacent to 

 this circular line, proceeding round the coast in the di- 

 rection of the motion of the hands of a watch, as required 

 by the law of the northern hemisphere, are as under, the 

 progressive increase of the hour being evidence of con- 

 formity with the law. 



North end of Davis Straits 

 Cape Race, Newfoundland 

 Jedore, Nova Scotia 

 Little Egg Harbour 

 Ocacroke Inlet . 

 St. Helena Sound 

 Doby Inlet . . 

 St. Simon's Isle . 

 Fernandina, Florida 

 St. Augustine, Florida 



h. 



m. 



10 



2 



10 



36 



II 



57 



12 



7 



12 



8 



12 



30 



12 



58 



I 



9 



I 



19 



I 



47 



