| | PREFATORY NOTE |
| I | BENJAMIN FRANKLIN AND HIS TIMES |
| II | ELI WHITNEY AND THE COTTON GIN |
| III | STEAM IN CAPTIVITY |
| IV | SPINDLE, LOOM, AND NEEDLE IN NEW ENGLAND |
| V | THE AGRICULTURAL REVOLUTION |
| VI | AGENTS OF COMMUNICATION |
| VII | THE STORY OF RUBBER |
| VIII | PIONEERS OF THE MACHINE SHOP |
| IX | THE FATHERS OF ELECTRICITY |
| X | THE CONQUEST OF THE AIR |
| | BIBLIOGRAPHICAL NOTE |
