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Features

Transmission of Messages through the Air by Electricity without Wires

By John Trowbridge

Electric Motive Power on Elevated Railways

By William Nelson Smith

Oscillating Hot Saw

Wire Ropeways, with Notes on the Plomosas Line

By B. McIntire

Purdy's Armored Twin War Vessel

A Multiple Portrait

Stereotyping

By Thomas Bolas

Automatic Apparatus for the Manufacture of Carbonated Waters

Glycerine

An Astronomer's Imaginary Visit to Venus

Photographic Equatorial Telescope

Galls on Lime

The White Oak

Culture of Fruit Trees under Glass

Action of Hydrogen Gas on Pig, Steel, and Iron

Building Plans and Specifications

Useful Engineering Books

Departments

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February 21, 1891

Think Outside the Gift Box