74 POLAR SEA.
globe. We must look for causes entirely local, that exist within the circle, and do not extend their influences beyond its borders, or that are universal in their character, and originate away out in the "sun studded heavens," or in the rays of the sun for one-half the year. For it is quite clear that all these influences would be as effectual in dissolving the vast glaciers of the frozen belt southward of the warm circle, and would render the en-tire arctic regions as mild and temperate as the open polar sea.
We have already spoken of the longitudinal, Electro-Magnetic currents, that they must converge to a common focus at or near the pole, and pass through the spherical shell, continuing southward upon the interior concave surface, thus making a complete circuit, and that where these currents pass through the water, they will necessarily produce friction, creating disturbances and agitation, thus imparting great heat to the surrounding waters, as is evidently the case at the Maelstrom off Norway, and other whirlpools in the Northern Seas, near which the corals and other tropical marine productions are found. These attenuated fluid elements may pass with the utmost facility the most solid material substances, but in their pathway they always pro-duce certain results, and quite generally heat ensues where there are any considerable Electromagnetic activities, and we readily discover, if all or most of these currents or threads that exist in every portion of the atmosphere converge at or near this point, or within the polar circle, and there pass through the water or more solid earth to the interior surface; then very great disturbances must exists and very considerable heat must