Niagara Falls Again Threatened, Automobile and Aeroplane Records and more

"Ehrlich-Hata 606"

How It was Discovered

American Ideas in British Battleships

The "Monarch"--a Modified "North Dakota"

The Restoration of Documents Charred by Fire

How Automobile Numbers are Concealed

The Beff Electric Tricycle

Automobile Novelties

New Things in America and Europe

The Variable Speed Aeroplane

Some Ingenious Designs

The Seventeen-year Locust or Periodical Cicada

The Two Races and When They Appear

Forests and Water Supply

Rules Governing the Competition for the $15,000 Flying Machine Prize Offered

The New York Public Library

How the Readers and the Books are Distributed in the New Building

How to Insert Small Screws

The Handy Boatman

The Inventor's Department - May 27, 1911

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