270 THE PHYSICAL GEOGRAPHY OF THE SEA. 



Am I far wrong, therefore, when I say that the present state of 

 our knowledge w^ith regard to the physical geography of the sea 

 has enabled the navigator to blaze his way among the winds and 

 currents of the sea, and so mark his path that others, using his 

 signs as finger-boards, may follow in the same track ? 



