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Features

Where the Petroleum Goes, Railroads the Foundation of National Prosperity and more

By J. Malcolm Bird

Tuning Up for the Cup Races

"Shamrock IV" -- The Unknown Quantity Among Four 75-Foot Racing Yachts

By J. Bernard Walker

The Romance of Invention--XIV

Cottrell-- Catalyser

By C. H. Claudy

What Industry Can do for Americanization

And Some of the Things Which the Industries May Expect from Americanization in Return

By H. T. Waller

Wonders in Steel Forging

The Role of Giant Hydraulic Presses and Huge Steam Hammers in Large-Scale Blacksmithing

By A. R. Surface

Baltimore's Tilting Dam

A Structure That Opens Automatically When It Has Backed Up Too Much Water

By J. F. Springer

How Plate Glass is Made

The Tedious Process by Which Modern Technology Has Been Able to Make Glass without Blowing

By Ralph Howard

Orchard Medicine Quacks, Moisture Absorption Through Varnish

The Naturalist's Corner

Botanical Notes from All Quarters of the Globe

By H. A. Gleason

Departments

  • Departments

    Correspondence - - July 3, 1920

  • Inventions New and Interesting - July 3, 1920

  • Recently Patented Inventions - July 3, 1920

  • Notes and Queries - July 3, 1920

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July 1920

See the World from a Different Perspective

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