Volume 122, Issue 20
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Features
Piercing the Catskills for Water
Some Constructional Details of the 18-Mile Tunnel Under the Shandaken Mountains
To Offset the High Cost of Ice
Making a River Pump its Water Uphill, Talking to Thousands by Electrifying and Amplifying the Speaker's Voice
A Merlin of Today
What the Audion of De Forest has Done and What it May Yet Do
Hoboes of Industry
How the Picturesque Wanderer of Yesterday has been Replaced by the Present Floating Labor
Making Bad Land Good
Land Reclamation the Next Step in the Fight to Feed the World
Our Share of the German Fleet
Five Ships that Fought at Jutland are on Their Way to the United States
The Architecture of the Atom
Some of the Details of the Langmuir Postulates as to the Atoms