Scientific American Magazine

The Fracture of the Duilio's 100-Ton Gun

The Wire Gauge

Elevated City Railroads

A Remarkable Oil Company

The Great Gas Well of Pennsylvania

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

Amending the Patent Law

A New Warehouse Truck

A New Ventilator

Improved Felly Plate

New Hose Carriage

New Ticket or Canceling Punch

New Egg Carrier and Crate

New Box Machine

Mechanical Inventions - May 1, 1880

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

Miscellaneous Inventions - May 1, 1880

A Novel Shading Pen

New Wall Tent and Stove

Nest-Building Fish, GASTEROSTEIDÆ

The Panda, or Wah

Agricultural Inventions - May 1, 1880

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