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An Electrical Gyroscope

By Geo. M. Hopkins

Professor Joseph Henry

Do Inventions Injure the Laborer?

Clearance and Compression

Meddlers in Arts in Which They Are Not Skilled

The Empire Dustless Ash Sifter

Astronomical Notes

By Berlin H. Wright

Russian Torpedo Boats

Andrews' Draught Apparatus for Stoves

Improved Mosquito Net Frame


Notes on the Telephone

By L. L. Duerden

Improved Vertical and Horizontal Vise

The Roberts Engine

The Ant Bear

New Collapsing Boat

Cigarette Making by Machinery

American Steam Fire Engines

Recent Eruption of Mount Hecla

Perpetual Motion

Some Recent Facts About Common Poisons

Observations on the Transit of Mercury of May 6, 1878

By Alfred M. Mayer and J. Walter Wood

Communication Received


  • Departments

    Notes and Queries

  • Business and Personal

  • Patents

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