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Elevated City Railroads

The Wire Gauge

The Fracture of the Duilio's 100-Ton Gun

A Remarkable Oil Company

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

The Great Gas Well of Pennsylvania

A New Warehouse Truck

Improved Felly Plate

A New Ventilator

New Hose Carriage

New Ticket or Canceling Punch

New Box Machine

New Egg Carrier and Crate

Mechanical Inventions - May 1, 1880

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

New Wall Tent and Stove

A Novel Shading Pen

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

  • Notes and Queries - May 1, 1880

  • Business and Personal - May 1, 1880

  • New Books and Publications - May 1, 1880

  • Index of Inventions - May 1, 1880

  • Patents - May 1, 1880

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