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Features

Proposed New Bridge over the Thames, London

Objects of Interest in Pittsburgh

Machinery for Making Slag Blocks

Open Contract for foot-Bridge, Manchester

Wings vs. Wheels

Regan's Smokeless Furnace Grates

The Otheoscope

Fire-Proof Construction

Taylor's Improved Drop light

Improved Forging Hammers and Stamps

How to Draw a Straight Line

The Elasticity and Density of Vapors

Experiments on the Maximum Elasticity and Density of Vapors

By Alex. Morton

Longitude by Telegraph

The Cycloscope

On Iron as a Natural Constituent of Wines

By C. R. Alder Wright

Magnetization of Polarized Light

The Electric Candle

The Electric Conductivity of Water

Method of Determining Index of Refraction

Influence of Light on the Electric Resistance of Metals

The Half-Prism Spectroscope

Russian Chemical Society, St. Petersburg

Absorption of Antimony and Arsenic by Charcoal

Analyst to thl' Geological Survey of New Zealand

By William Skey

Air in Sea Water

Chemical Notes

The Chemical Composition of the Flesh of the Halibut

On Drops

The Origin of Mineral Oils

Silver Mud in Oregon

The Remarkable Silver and Coal Mines of Peru

Diffusion of Strontian in Nature

On the Probable Origin and age of the Sun

By James Croll

A Biographical Sketch of an Infant

By Charles Darwin

The Fur-Seal

Chess Acrostics

Scientific American Chess Record

Master Harry Boardman

Third American Chess Congress

The Centennial Problem Book

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