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A Retrograde Step

Trial Speed and Sea Speed

Courage and Sympathy in Disaster

An Opinion from Panama

Prof. Sir George H. Darwin

The Whistling Vibration of a Drop

The Proposed Amendment to the Trade-Mark Law

The National Academy of Sciences

By Marcus Benjamin

The Automatic Conveyer in Lumbering

By Day Allen Willey

A New Method of Heating Switches

The Electric Locomotives of New York, New Haven and Hartford Railroad

The Hendrick Hudson Memorial Bridge

Curiosities of Naval Architecture--Round Ships and Globular Vessels

By C. Field

How to Construct an Experimental Polyphase Motor

By A. W. Forstall

A Machine for Picking Cotton

By William Dale

The Sense of Smell in Snails

By Alfred Gradenwitz

A Convenient Drafting Instrument

Retaining Device for Barrels

A Novel Toy

Book Purse

Business and Personal Wants


  • Departments


  • Recently Patented Inventions

  • New Books, Etc.

  • Notes and Queries

  • Index of Inventions

  • Patents

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May 05, 1906

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