A fascinating look at the world's earliest simple machines -- wheels, gears, pulleys, and levers -- to today's complicated telephones and plastics, Eyewitness: Invention presents the stories behind amazing inventions and how they changed the world. The most trusted...
Photographs and text explore such inventions as the wheel, gears, levers, clocks, telephones, and rocket engines.
A unique and fascinating introduction to the amazing variety of inventions, both ancient and modern. From simple machines such as wheels, gears, pulleys, and levers, Eyewitness Invention charts the developments of weights and measures, writing implements, early timepieces, and...