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Elevated City Railroads

The Wire Gauge

The Fracture of the Duilio's 100-Ton Gun

A Remarkable Oil Company

The Great Gas Well of Pennsylvania

Some Electrical Measurements of One of Mr. Edison's Horseshoe Lamps

By A. M. Mayer, B. F. Thomas and Henry Morton

Amending the Patent Law

A New Ventilator

Improved Felly Plate

A New Warehouse Truck

New Hose Carriage

New Ticket or Canceling Punch

Mechanical Inventions - May 1, 1880

New Egg Carrier and Crate

New Box Machine

"American Industries-No. 41" - (American Industries.--No.41)

A Novel Shading Pen

New Wall Tent and Stove

Miscellaneous Inventions - May 1, 1880

Nest-Building Fish, GASTEROSTEIDÆ

By A. W. Roberts

The Panda, or Wah

Agricultural Inventions - May 1, 1880


  • Departments

    Correspondence - May 1, 1880

  • Business and Personal - May 1, 1880

  • Notes and Queries - May 1, 1880

  • Index of Inventions - May 1, 1880

  • New Books and Publications - May 1, 1880

  • Patents - May 1, 1880

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May 01, 1880

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