| 1. | PREFACE |
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| 2. | GREAT MOMENTS IN SCIENCE |
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| 3. | LIST OF HALFTONE ILLUSTRATIONS |
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| 4. | LIST OF LINE DRAWINGS |
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| I. | THE AGE OF FIRE
The Secret of Fire Making
The Rock that Melted—Iron |
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| II. | A FOOD CYCLE
Five Finds—On the Road from Clay to
China
The Powdered Wig
A Tribute to the Tin Can |
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| III. | THE ROMANCE OF THE WHEEL
Father Nile
Wind Against Water |
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| IV. | FROM FIBER TO CLOTH
A Chinese Princess and Her Silk Dress
A Secret Kept for Three Thousand Years
When Color Came |
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| V. | STORIES OF TIME AND SPACE
Berosus the Babylonian
The Water-Thief
Galileo and the Pendulum
A Clock to Go Two Thousand Years
Compass and Radio Compass |
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| VI. | FUEL FOR POWER
James Watt and the Steam Engine
George Stephenson and the "Rocket"
A Century of Coal |
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| VII. | MORE STORIES OF TIME AND SPACE
Makers of Picture Words
The First Alphabets
From Papyrus to Paper
The First Printing Presses |
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| VIII. | THE WONDERS OF LIGHT
The First Telescope in Venice
Daguerre and Photographs
Photographing with the X-Ray |
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| IX. | NEW SOURCES OF POWER
Benjamin Franklin and His Kite
The Compass Again
Faraday and the Dynamo
The First Oil Well in America
Engines on Wheels—the Automobile
The First Balloon Flight
Engines on Wings—The Airplane
Altitude Flights |