38 THE OCEAN. [Book II. 



ocean ; whereas the stream o e results from the yield- 

 ing of the lesser force of the lower strata to the 

 greater force of the diverging tendency of the upper 

 strata ; therefore, although at the surface of the ocean 

 the stream a b c is effectually resisted by the stream 

 o E, it will nevertheless meet with no such resistance 

 in the lower strata ; but, in proportion as the force 

 of the stream o e diminishes beneath the surface, 

 it will be underrun by the stream a b c ; and at the 

 bottom of the ocean, not only will the stream a b c 

 meet with no resistance from oe, but under the 

 action of the vertical forces of circulation, its south- 

 ward course as an under current will be accelerated 

 until it completely underruns o e, and reappears at 

 the surface in the equatorial regions. 



Section VI. — Under-Currents within the Districts. 



Thus, whilst opposing the stream o e on the sur- 

 face of the ocean, the stream a e c joins the course of 

 the streams flowing towards the equator at the bot- 

 tom of the ocean. But though a b c joins the course 

 of those streams at the bottom of the ocean, they are 

 thrust away by it from the western part of the dis- 

 trict j List as the streams o e are on the surface ; and 

 therefore by this conflicting action a counter- current 

 must be formed at the bottom of the ocean, running 

 counter to the stream n e s w, under the axis of 

 rotation inversely as e h runs counter to it on the 

 surface. 



