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Features

First Underground Mining Mill in America

By W. F. Wilcox

Around the World in Three Days?, The Uses Of The Navy and more

Again the Helicopter?

Experiments by Prominent Inventors Who Hope to Realize This Long-Standing Dream

By Robert G. Skerrett

Post-Bellum Britain and the Inventor

Some Facts and Figures Regarding the Present British Patent Activities

By George Craydon Marks

The Romance of Invention--V

Some Notes on the Lifework and Character of a Great Chemist

By C. H. Claudy

With Typewriter and Offset Press

How the Scientific American was Manufactured in the Absence of Compositors and Pressmen

Signposts of the Sea

The United States Lighthouse Service

Bombardments from the Skies

The Recent Lake Michigan Meteorite, and Others of the Same Breed

Why Horses are Shod

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    Inventions New and Interesting - December 13, 1919

  • Recently Patented Inventions - December 13, 1919

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December 13, 1919

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