Volume 116, Issue 2
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Features
A Proposed Highway Tunnel Beneath the Hudson River
Two 17-foot Roadways To Relieve the Congestion on the River Ferries
Simple Methods of Determining Rifle Muzzle Velocities
What the French Helmet will Stand
Machine Guns by the Thousands
How a Gigantic Industry was Conceived, Planned and Realized in Less Than a Year's Time
Morning and Evening Stars for 1917
Model Prison to be Built in Illinois, When a Fly-Wheel Bursts and more
Security from Escape and from Disease no Longer to Be Regarded as Incompatible