SA Supplements

Improved Lifting Dock

Planetary Wheel—Trains

A Delta Metal Yacht

The Construction of Frame Buildings

Ritter's Perspectograph

Filtering Cisterns

Gilding

Aluminum Mordants

Restoration of Fased Photographs

Basic Refractory Materials

Physics and Chemistry

Simple Photo—Enlarging Apparatus

Henry Watts, F.R.S.

Gold and Silver in the Vapor of Phosphorus

On Different Methods of Producing Cold Artificially

On Making Joints in Wires Used for Electric Lighting

Anders' Telephone Transmitters

Electricity Applied to the Driving of Galleries in Mines

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

The Standard of Light Adopted by the Paris Conference

A Modification of Hughes' Magnetic Balance

The Electric Conductivity of Metals and their Alloys

The Dakota Tin Deposit

A Peculiar Dust in Snow

The Extraction of Gold

The Earthquake Recorder

A Study of the Horse's Trot

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

A Fish-Eating Plant

How to Make a Photographic Background

A Lily Bed

Nickel ore from Nevada

Patents - August 23, 1884