A Treatise on Perfect Railway Signaling (Paperback) ~ Henry W. S... Cover Art

A Treatise on Perfect Railway Signaling (Paperback)

By: Henry W. Spang (Author)

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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: northern border. West of that meridian, except in the Rocky Mountains, the frequency steadily diminishes until it is practically zero at the Pacific Coast. The general direction of approach in the United States is from the West. At Key West, Fla., however, the approach is from the East, and at Galveston, Texas, from the Northeast, North, or Southwest. A snow storm, acompanied with a high wind, is also attended with great generation of electricity and lightning discharges. Lightning discharges also attend volcanic eruptions, due to the vapor of water, heated air, etc., quickly ascending to a great heighth and over a great area and a consequent great generation of electricity. The Great Electrification of the Earth. Electric induction takes a prominent part during a thunderstorm, and through its influence the path or paths are determined over which a disruptive discharge takes place between two clouds, or layers of a cloud, or between the clouds and the earth. A highly positively electrified storm-cloud or clouds cause by induction acting through the vapor particles of the intervening air, the earth beneath and everything thereon to become intensely electrified; the air nearest the earth, being also more or less negatively electrified. Attention is especially called to the fact that the area and depth of earth highly electrified by induction is about equal to the area and depth of the great electrical generation and accumulation in the overhead clouds, and it is principally to a want of knowledge of this important fact, that investigators have failed to determine the true actions in and upon the earth attending lightning discharges. The area of earth thus intensely electrified in many cases extends over a circle from one to three miles in diameter; and judgin...

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