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A Second Panama Canal, The King's Cup Ocean Race and more

A Giant Job of Underpinning

Building a Subway Beneath Philadelphia's City Hall, with its Inadequate Foundations

By William A. McGarry

The Vacuum Tube as an Engineering Problem

By W. C. White

Why Balloons Bounce Off Clouds

By Corley P. McDarment

Pumping Coal from Mine to Seaboard

A Scheme for Shipping this Fuel via Pipe Lines, Much as Oil now is Shipped

By C. H. Thomas

Little Things that Count Big

The Refinement of Details that Marks Our Present Railroad Development, and Some of the Further Needs

By Herbert T. Walker

How we Think

The Microscopic Structure of the Intellectual Portion of the Human Brain

By Leon Augustus Hausman

Leading Navies Compared

First Line Fighting Strength Today and in 1924, When Ships now Building will be in Operation

The Engineers of Ancient Egypt

Mechanical Devices Used in Constructing Pyramids and Erecting Obelisks

By G. A. McWilliams

Industrial Skin Hazards


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  • Inventions New and Interesting

  • Recently Patented Inventions

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