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Central Institution for the City and Guilds of London Institute for the Advancement of Technical Education, South Kensington

A Double Bicycle

Nero's Engineers

The Animated Motor

An English Railroad Station

Pacific Deep Sea Soundings

Bronze and Brass for Marine Purposes

Malleable Iron and the Reheating of Steel

American Society of Mechanical Engineers

Physical Society, London, November 12, 1881

On Some Spirals Observed in Crystals, Illustrating the Relation of their Optic Axes

The Dayton, Ohio, Explosion

Amateur Mechanics

Glass Engraving

The Ethics of Invention

By an Old Technologist

How to make Permanent Magnets

Commander Gorringe's Plan for Conveying Wheat from Oregon to Europe

Exhibit of the French Minister of the Marine at the Paris Exhibition of Electricity

Electric Hoist

Apparatus for Covering Telegraph Wires

The Gulcher Dynamo


Lager Beer

What may be Done with a Few Sticks

On Washing Gelatine Emulsion

By William England

A New American Seaport Projected

Trade between New Zealand and the United States

Karl Remigius Fresenius

George Edmund Street, R.A.

Proceedings of the London Chemical Society, Thursday, November 3, 1881

On Citraconic and Mesaconic Ethers, and Maleic and Fumaric Acids.

By Gilbert and W. H. Perkin

Some of the Undeveloped Mineral Resources of North Carolina

Phosphorescent Substances

Specific Heats and the Heat Produced by the Dilution of Perchloric Acid

By M. Berthelot

Wicrersheimer's Preserving Fluid

On the Heat Resulting from the Formation of Potassium Perchlorate

By MM. Berthelot and Vielle

A Gypsum Test for Milk

Ignition of Ether at an Operation

Applying Fertilizers to Roots

How to Clean Bottles, Etc.

By Albert Wetterstroem

Pharmacology and Therapeutics




Researches in American Archæology.— The Mound Builders and the Aztecs


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