Popular Mechanics

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Popular Mechanics inspires, instructs and influences readers to help them master the modern world. Whether itís practical DIY home-improvement tips, gadgets and digital technology, information on the newest cars or the latest breakthroughs in science -- PM is the ultimate guide to our high-tech lifestyle.
  

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Contents

Better radio through the earth
1
Radio broadcasting
Evolution of locomotive in century
4
Locomotives (History)
Mysteries of the sea
7
Shipwrecks
He lives on the edge of a volcano
14
Thomas Augustus JAGGAR; 1871-., Volcanoes
Blazing trails for the map makers
19
United States Coast and Geodetic Survey

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