THE HEROIC AGE OF AMERICAN INVENTION Author:L SPRAQUE DE CAMP Between the 1830s and World War I, life was changed dramatically for the world due to remarkable inventions discovered by talented men and backed by the organization and finance of the industrical revolution. This book covers the careers and work of 32 Americans that were major contributors; including McCormick, Langley, Wright Brothers, Colt, ... more »Bell, Edison.« less