The New Larned History, for Ready Reference Reading and Research, Vol. 4 of 12

The New Larned History, for Ready Reference Reading and Research, Vol. 4 of 12 : The Actual Words of the World's Best Historians, Biographers and Specialists; A Complete System of History for All Uses, Extending to All Countries and Subjects and Represen

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Excerpt from The New Larned History, for Ready Reference Reading and Research, Vol. 4 of 12: The Actual Words of the World's Best Historians, Biographers and Specialists; A Complete System of History for All Uses, Extending to All Countries and Subjects and Representing the Better and Newer Literature of History; Elec to Frob The material to be broken up.] The electro-magnet, in some form or another, is the basis of all modern electric telegraphy, of telephony, of machines for generating electric currents by mechanical power called dynamos, of electric motors, electric bells, ln duction coils, and countless other appliances used in 'everyday life. - J. A. Fleming, Fifty years 0/ electricity, pp. 1 - 2. - They are used for drawing a bit of steel dust out of a man's eye [or a steel fragment from a wound] and for magnetic cranes which will hold up a weight of many tons. Edison invented a magnetic separator for sorting out iron ores. The broken ore has to pass through an appa ratus containing electro-magnets. First comes a set of magnets just strong enough to pick out the richest kind of ore, known as magnetite; then a stronger set which separates hematite, and the useless residue passes on and is got rid of. - C. Hall, Triumphs of invention, p. 159. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.show more

Product details

  • Paperback | 974 pages
  • 152 x 229 x 49mm | 1,275g
  • Forgotten Books
  • United States
  • English
  • , black & white illustrations
  • 0243137214
  • 9780243137213