A Call for the Automatic Stop, Do You Want an Airship? and more

Twelve Hundred Charts at a Third of a Cent

A Few Words About a Necessary Expenditure for Which Congress Has Failed to Provide

When Humpty-Dumpty Travels

The Why of Luminous Paints

Making the Most of Niagara

Projects Looking to the better Utilization of This Great Water Power

A Problem of Electric Drive

The Advantages of the Diesel-Electric System Over the Straight Diesel Drive

Jobs for Sawdust

Some of the Useful Ends to Which This Waste Material Is Being Put

The Musical Hospital

How Flattened and Fractured Brass, Wood and Stringed Instruments Are Repaired

An Extinct Sea Lizard from Western Kansas

Optical Tricks with Electric Sparks, Reclamation Project in Northeastern Brazil