The Wonder Book of Knowledge / The Marvels of Modern Industry and Invention, the Interesting Stories of Common Things, the Mysterious Processes of Nature Simply Explained

by Unknown

[7] Illustrations by courtesy of Plymouth Cordage Co.

[8] Illustrations by courtesy of Colt’s Patent Fire Arms Manufacturing Co.

[9] Illustrations by courtesy of Consolidated Fireworks Company of America.

[10] Illustrations by courtesy of Eastman Kodak Company.

[11] Illustrations by courtesy of R. Hoe & Co.

[12] Illustrations by courtesy of the A. I. Root Co.

[13] Illustrations by courtesy of the Hotpoint Electric Heating Co.

[14] Illustrations by the courtesy of the American Telephone and Telegraph Co.

[15] Illustrations by courtesy of the Otis Elevator Co.

[16] Illustrations by courtesy of the International Silver Co.