The Rewards and Penalties of Polar Exploration, Multiple Engines for Passenger-carrying Aeroplanes and more

G. Stanley Hall

An American Leader in the Science of Human Nature and Its Education

Drawing Maps from Nature

The plane-Table and its use

The Total Solar Eclipse of 1911

The Moon's Shadow Traces a Course from Australia to Central America

Battleship versus Destroyer

The Struggle Between the Big Gun and the High-speed Torpedo

The Gordon Bennett International Aviation Trophy

A New Aeroplane Passenger-carrying Record

Louis Breguet's Feat of Transporting 11 People 3 Miles Across Country. Description of the Machine

How to Rebore a Crank-pin Hole in a Locomotive Driving-wheel

An Adjustable Rose Reamer

A Novel Pipe Wrench

Removing a Broken Handle from an Ax Head

Light Fixture for a Shipping Room

Removing Old Boiler Tubes, A Handy Drill Socket and more

Direct-Indirect Lighting Fixtures, Fan on Grinder Spindle and more

The Inventor's Department - April 22, 1911

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

Lakes Tipped by Winds, Aeronautics