... even warm. Potential action generated in a dark, cold body, may produce great heat and light, at a distance from the seat of activity; and what is thus wrought artificially in a small way may ... invisible to the naked eye, are incessantly, and at all seasons, [Pg 44]in action, by day as well as by night.[9] May not this auroral display then be regarded in a measure as confirmatory of what ... operation between sun and earth, and is, in its intimate and essential nature, a vito-magnetic fluid[B] (or so-called magnetic). Subtle, and apparently intangible, manifesting itself rather as...