The Trials of the Battleship “North Dakota”

Present Conditions on the Panama Canal

Aeronautics

Electricity

Science

A Gasoline Engine for Corn Husking

Salvage of the United States Cruiser “Yankee” by Compressed Air

The Gyroscopic Mono-Railroad

Controlling Steamship Engines from the Bridge

Sounding the Ocean of Air Above Us

Atmospheric Exploration

A Self-Acting Mail Elevator

Handy Man's Workshop

Porosity of Liquids

Scissors with a Saw-Tooth

How to Wind an Open Spring

Plating Spoons and Forks at Home

Blue Roses

Device for Drawing Ovoids

Home-Made Knob and Tube Boring Machine

Device for Washing Prints

Inexpensive Apparatus for Illustrating the “Hydrostatic Paradox”

The Self-Smoking Pipe