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The Future as Suggested by Developments of the Past Seventy-five Years, Civil Engineering and more

Seventy-Five Years of Invention

A Record of Progress, Decade by Decade

Transportation by Sea and Land

Review of Seventy-Five Years of Progress in Shipping and Railroad Development

Seventy-Five Years of Applied Electricity

From the Telegraph of 1845 to the Radio Station of Today with a Range of Twelve Thousand Miles or More

The Rise of the Automobile

How One of the Props of Modern Existence Came Into Being and Acquired Its Present Position

Seventy-Five Years of Pure Science

Some of the Things We Know Today That Were Not Suspected When the Scientific American: Was an Infant

The Mastery of the Skies

How the Scientific American Has Been Privileged to Chronicle the Development of Airship and Airplane

Seventy-Five Years of American Patent Administration

How the System Has Developed from Small Beginnings, and What It Means to the Nation's Industry

By William I. Wyman

The Diamond Jubilee of the Scientific American

Three Quarters of a Century's Service to the Cause of Invention and Popular Science

From Wet Plate to Motion Pictures

Some of the Milestones That Accentuate the Development of Amateur and Professional Photography

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    Recently Patented Inventions - October 2, 1920

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October 1920