Majestic Lights: The Aurora in Science, History, and the Arts (Special Publications) by Robert H. Eather
English | Jan 8, 1991 | ISBN: 0875902154 | 323 Pages | PDF | 55 MB
The atmosphere being heavier in the polar regions, than in the equatorial, will there be lower; as well as from that cause, as from the smaller effect of the centrifugal force: consequently the distance of the vacuum above the atmosphere will be less at the poles, than elsewhere;…May not then the great quantity of electricity, brought into the polar regions by clouds, which are condensed there, and fall in snow, which electricity would enter the earth, but cannot penetrate the ice; may it not, I say, break through that low atmosphere, and run along in the vacuum over the air and towards the equator; diverging as the degrees of longitude enlarge; strongly visible where densest, and becoming less visible as it more diverges; till it finds a passage to the earth in more temperate climates, or is mingled with their upper air.