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Wireless Telegraphy and Telephony Simply Explained / A Practical Treatise Embracing Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and Its Present Day Applications, Together With a Chapter on the Possibilities of Its Future Development cover

Wireless Telegraphy and Telephony Simply Explained / A Practical Treatise Embracing Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and Its Present Day Applications, Together With a Chapter on the Possibilities of Its Future Development

Chapter 39: MINING
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About This Book

The text explains the physical principles of wireless transmission and reception, describing electromagnetic oscillations and how waves are radiated and intercepted, then surveys practical apparatus such as aerial systems, transmitters, receivers, coils, condensers, spark gaps and detectors. It treats tuning, coupling and directional methods, discusses telephone transmitters and the wireless telephone, and outlines applications in maritime, military and aerial service. Chapters interweave theory, constructional sketches and illustrations, and conclude with reflections on accomplishments, limitations and the technology's prospective development.

MINING

ORE DEPOSITS, WITH A CHAPTER ON HINTS TO PROSPECTORS. By J. P. JOHNSON This book gives a condensed account of the ore-deposits at present known in South Africa. It is also intended as a guide to the prospector. Only an elementary knowledge of geology and some mining experience are necessary in order to understand this work. With these qualifications, it will materially assist one in his search for metalliferous mineral occurrences and, so far as simple ores are concerned, should enable one to form some idea of the possibilities of any he may find. Among the chapters given are: Titaniferous and Chromiferous Iron Oxides–Nickel–Copper–Cobalt–Tin–Molybdenum–Tungsten–Lead–Mercury–Antimony–Iron–Hints to Prospectors. $2.00

PHYSICS AND CHEMISTRY OF MINING. By T. H. BYROM. A practical work for the use of all preparing for examinations in mining or qualifying for colliery managers' certificates. The aim of the author in this excellent book is to place clearly before the reader useful and authoritative data which will render him valuable assistance in his studies. The only work of its kind published. The information incorporated in it will prove of the greatest practical utility to students, mining engineers, colliery, managers, and all others who are specially interested in the present-day treatment of mining problems. Among its contents are chapters on: The Atmosphere; Laws Relating to the Behavior of Gases; The Diffusion of Gases; Composition of the Atmosphere: Sundry Constituents of the Atmosphere; Water; Carbon; Fire-Damp; Combustion; Coal Dust and Its Action; Explosives; Composition of Various Coals and Fuels; Methods of Analysis of Coal; Strata Adjoining the Coal Measures; Magnetism and Electricity; Appendix; Useful Tables, etc.; Miscellaneous Questions. 160 pages. Illustrated. $2.00

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