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Features

"American Industries-No. 42" - (American Industries.--No. 42)

Steam Injectors

Two Tons of Silver Per Week

The Registration of Trade Marks

The Telegraph Set Screw

The Use of Steel for Structural Purposes

Improved Telephone Central Office Switch Board

The Coffee Product

Recent Telephone Experiments

Improved Gang Plow

New Dump Car

The Gower System of Telephonic Communication, Paris

Agricultural Inventions - May 15, 1880

Miscellaneous Inventions - May 15, 1880

New Rotary Engine

Mechanical Inventions - May 15, 1880

Novel Tool Handle

Improved Gun Wad

A Chapter on Trout

By Daniel C. Beard

Engineering Inventions - May 15, 1880

Flowers and the Weather

Communications Received - May 15, 1880

Departments

  • Departments

    New Inventions - May 15, 1880

  • Correspondence - May 15, 1880

  • Notes and Queries - May 15, 1880

  • New Books and Publications - May 15, 1880

  • Business and Personal - May 15, 1880

  • Index of Inventions - May 15, 1880

  • Patents - May 15, 1880

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