Skip to main content


Fish Fancying and Freak Farming, The $5,000 Einstein Essay Contest and more

By George H. Dacy

The Twentieth-Century Lumber-Jack

Some of the Machines and Methods Which Were Not at the Disposal of His Grandfather

By J. F. Springer

Handling the Heating-Furnace Doors

By Jules Gaudel

Is the Anchor Safe?, Electrification in Europe and more

By Paul Harnden

Turning the Wheels of a Century Hence--II

Water Power--Some of the A-B-C's That Govern Its Existence and Development

By C. H. Claudy

Measuring Steam

Methods and Instruments for Determining What the Power Plant Is Doing

By A. R. Surface

Toys that do Great Work

The Indispensable Place Occupied by Models in the Engineering of Today

By M. A. Henry

The Mechanical Hello Girl

An Automatic Telephone Switchboard That Can Take Care of the Busiest Exchange

By H. A. Mount

The Role of Asbestos

Some Facts Bearing on the Growing Importance of This Substance in Industry and Architecture

By Ralph Howard


  • Departments

    Correspondence - July 10, 1920

  • Inventions New and Interesting - - July 10, 1920

  • Recently Patented Inventions - - July 10, 1920

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
Scroll To Top