File:Radio, miracle of the 20th century a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject (14570118678).jpg

Identifier: radiomiracleof2000drin (find matches)
Title: Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development
Year: 1922 (1920s)
Authors: Drinker, Frederick E. (from old catalog) Lewis, James G., (from old catalog) joint author
Subjects: Radio
Publisher: (Philadelphia, Printed by National publishing co.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ay be picked up andused with the iron holder and without danger of burningthe hands. BEARING UPON RADIO. All of this has a definite bearing upon radio. Eadio ispossible through the application of the laws of radiationand conduction to the element electricity. The funda-mental laws that govern the action of heat and lightwaves actually apply to the radiation of electrical dis-turbances. In radio, however, many elements have toenter into our problem. For instance, the nature of theether, the tendencies of various metals used in the appli-ances, etc. In passing it might be well to point to the fact that asubstance like water is, for instance, a very poor conduc-tor of heat. To prove this one can take a long narrowtest tube (glass) and place in its bottom a piece of ice,weighted down with some heavier substance to keep itfrom floating to the top. By applying a flame to the up-per part of this test tube the water in this portion of thetube may be boiled, the steam or water vapor will carry
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