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Features

Improved Lifting Dock

Planetary Wheel—Trains

By C. W. MacCord

A Delta Metal Yacht

The Construction of Frame Buildings

By Clarence O. Arey

Ritter's Perspectograph

Filtering Cisterns

By G. D. Hiscox

Gilding

Restoration of Fased Photographs

Aluminum Mordants

Basic Refractory Materials

Simple Photo—Enlarging Apparatus

Henry Watts, F.R.S.

Physics and Chemistry

Gold and Silver in the Vapor of Phosphorus

By P. Hautefeuille and A. Perrey

On Different Methods of Producing Cold Artificially

By J. J. Coleman

Anders' Telephone Transmitters

On Making Joints in Wires Used for Electric Lighting

Electricity Applied to the Driving of Galleries in Mines

Experiments on the Passage of Electricity Through Gases.—Sketch of a Theory

By Arthur Schuster

A Peculiar Dust in Snow

The Electric Conductivity of Metals and their Alloys

The Standard of Light Adopted by the Paris Conference

A Modification of Hughes' Magnetic Balance

The Dakota Tin Deposit

The Earthquake Recorder

The Extraction of Gold

A Study of the Horse's Trot

Little Duck, Winner of the Grand Prize of Paris, 1884

A Fish-Eating Plant

Nickel ore from Nevada

By Spencer B. Newberry

A Lily Bed

How to Make a Photographic Background

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August 23, 1884

Complex Causes. Alternative Solutions.