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Features

An Imminent Railroad Danger, Causes of Aviation Accidents, and more

The Winning of the International Aviation Trophy

How Weymann Upheld Our Colors Single-handed and Won the World's Greatest Speed Event

The Beacon Hill Tunnel

How a Half-mile of the Boston Subway Was Built In Tunnel

By G. D. Emerson

A Comparison of the German and American Navies

Our Great Superiority in Gun-fire Places the United States in the Lead.

By H. D. Brandyce

Henry Fairfield Osborn

America's Foremost Palaeontologist

By Benjamin C. Gruenberg

The Latest of the Big Railway Terminals

The Chicago Terminus of a Leading Western System

Heart Diagnosis by Electricity

By William Day

Abstracts from Current Periodicals- July 22, 1911

Phases of Science as Other Editors See Them

Home-made Anchors

By Albert F. Bishop

Adz-tightener

By W. A. Lane

Making a Wooden Tube

By W. D. Graves

Turning Ball Joints to Gage

By C. G

An Improvised Bobbin Winder

By Henry H. Riggs

A Simple Turnbuckle

By William Grotzinger

The Inventor's Department- July 22, 1911

Simple Patent Law; Patent Office News; Inventions New and Interesting

Departments

  • Recommended

    New Books, Etc.- July 22, 1911

  • Departments

    Notes and Queries- July 22, 1911

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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial