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An All-Day Race between Battleships

The Growth of our Railroad System

Guard Rails in the Subway

The Mysteries of the Ocean Bed

The Bacterial Purification of Sewage

By Albert Glyndon

The New Gasoline Motor Car

The Flax Industry of To-Day

Progress of the New Jersey Tunnels and Subways

The Lifting Power of a Screw Propeller for Aeronautical Work

A Novel Method of Dog-Shearing

The Salmon Fisheries of the Northwest

By Day Allen Willey

An Improved Excavator

Depth Gage for Brace Bits

Business and Personal Wants


  • Departments

    The Heavens in December - December 9, 1905

  • Index of Inventions - December 9, 1905

  • Notes and Queries - December 9, 1905

  • Recently Patented Inventions - December 9, 1905

  • Patents - December 9, 1905

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Introducing Scientific American Health & Medicine

Introducing Scientific American Health & Medicine