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Features

The Household that Packs into a Trunk, Changes Rule of Road and more

Making the Hetch-Hetchy Dam Itself

How California's Big Water Development Is Carried On with Its Own Water

By J. F. Springer

A Magnetic-Proof House for the Workers

By Harry A. Mount

Piloting the Ship with the Ears, Rust Preventives

By George Gaulois

The Romance of Invention--XVIII

William Leroy Emmet--Inventor, Engineer and Builder of Power Plants

By C. H. Claudy

Painted Coffee

A Trick of the Trade That Is Little Known Outside Brazil

By Robert C. Brown

A Mechanical Age for the Farm

What Nebraska, Through Its State University, Is Doing to Bring It About

By R. P. Crawford

Extracting Oil by Electrolytic Action

A Recently Developed Process Which Bids Fair To Be of Economic Moment

By Robert G. Skerrett

San Francisco's Traffic Convention and Street Safety Show

By C. W. Geiger

Something New in Gasoline-Driven Plowing Machines

By James H. Rodgers

Use of Pulverized Lignite for Fuel in Australia

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  • The Service of the Chemist

  • Inventions New and Interesting

  • Recently Patented Inventions

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