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Features

Becquerel, Regnault, and Secchi

Archæological Discovery in Rome

Experiments with the Telephone

By A. Domoget

Clamond's Improved Electric Thermo-Pile

Notes on the Telephone

Its History and the Theory of its Construction and Operation

By R. M. Ferguson

A Visit to the Inventor of the Phonograph

Cincinnati Inclined Planes.—The Highland House

Improved Fire-Engine Pump

The Working of Coal

Compressed Air Receptacles

Mining in Boulder County, Colorado

By F. L. Vinton

Iron and Coal in British Columbia

Recent Torpedo Experiments in England

Damascened Ornaments from a Shield, Hispano-Moresco Work. —Suggestions for Decorative Art

Prize for Blowpipe Apparatus

The Geological Antiquity of Flowers and Insects

By J. E. Taylor

Olive Culture

What is a Diatom?

Phosphorescence and Fluorescence

By M. Fave

Platinum Metals

Chemical Reactions of the Electric Effluve and upon Persulphuric Acid

By M. Berthelot

Œnoline, and its Preparation

Ginger

Refraction of Gases and Vapors

By M. Mascart

Repulsion Resulting from Radiation

[Presented to the French Academy by M. Th. du Moncel]

By W. Crookes

New Products Obtained from Coal-Gas: Ponsœlion, a New Pigment, and Cyanon, a New Gunpowder

By Lewis Thompson

On some Thallium Pigments

By Thomas W. Salter

The Transit of Mercury on May 6th

Joachim Lowenthal

Scientific American Chess Record

Dubuque Problem Tournament No. 1

Solutions to Problems

Anderssen vs. Paulsen

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