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Present Conditions on the Panama Canal

The Trials of the Battleship “North Dakota”




A Gasoline Engine for Corn Husking

By Frank C. Perkins

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

By A. R. Van Der Veer

Scissors with a Saw-Tooth

By W. J. C.

Plating Spoons and Forks at Home

By A. J. Jarman

How to Wind an Open Spring

By Otto Kerner

Blue Roses

By Gustave Michaud

The Self-Smoking Pipe

Inexpensive Apparatus for Illustrating the “Hydrostatic Paradox”

By F. R. Gorton

Device for Drawing Ovoids

By J. O. Brouillet

Device for Washing Prints

By K. Parkhurst and W.

Home-Made Knob and Tube Boring Machine

By R. H. Brockmann


  • Departments


  • Notes and Queries

  • Recently Patented Inventions

  • Index of Inventions

  • New Books, Etc.

  • Patents

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November 27, 1909