84 



0. E. SCHI0TZ. 



[NORW. POL. EXP. 



LINES OF FORCE 



Ocean Continent 



force the higher they rise, while on the other hand, the lines of force in the 

 space beyond, under the ocean, will be thinned out (see fig.). This holds 

 good until the level of the ocean bottom is reached, when the density 

 becomes greatest on the side of the continents, and the difference of density 

 is considerably greater than below. As a consequence of this, the lines 



