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Features

Upon the Production of Sound by Radiant Energy

By Alexander Graham Bell

Gray's Harmonic Telegraph System

The Gower-Bell Telephone

Molecular Electro-Magnetic Induction

The Denver and Rio Grande Railway

Magneto-Electro Induction

By F. Guthrie and C. V. Boys

The Beef Juice Furor

Prof. Gamgee's New Motor—The Ammonia Engine

The Gamgee Zeromotor

Celerity of the New York Fire Department

Rice as a Brewing Material

Scarlet for Felts

Machines for Repairing Locomotives

Stray Notes on Gelatine Plates

By E. Brightman

Handkerchief Extracts

By Robert H. Cowdrey

On the Removal of Aqueous Vapor from the Atmosphere

By J. J. Coleman

Action of Bacteria on Gases

The Chemistry of a Lump of Clay

A New Continuous Ammonia Process

Organic Carbon and Nitrogen in Water

A Simple Rapid Filtering Apparatus

The Lime-Light

By T. Frederick Hardwich

Spectrum Analysis as Applied to the Solar System

By Dr. Wm. Huggins, Esq., D. C. L., LL. D . , F. R. S.

Prevention of Diphtheria

By Edwin R. Maxson

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    May 21, 1881

    Help Us Reforest the Mississippi River Valley