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Features

Coal Required to Puddle a Ton of Iron

The “Victory” Printing Press

Friction

On Axle Breakage

By W. Thamm

Action of Burning Gunpowder on Steel

Strength of Bricks

Gas Pressure-Gauge

Steam Boiler Economy

The London “Times” on American Manufactures

Heating Feed-Water

By J. Haug

Irwell River Bridge, Manchester, Eng

A Ball on a Jet of Air, Steam, or Water

By W. F. Durfee

Wool Dyeing

By George Jarmain

Why Silk Hats are Dear

A Curious New Sponge, Kallispongia

Adulteration of Cochineal

Evidences of the Age of Ice

By Henry Woodward

The Temperature of the Sea

The Planet Vulcan

Colored Hail and Snow

Lecturer on Chemistry, Glasgow

By A. T. Machattie

Geological Time

Presidential Address Before the Liverpool Geological Society

By T. Mellard Reade

Fermentation

How the Earth may be Destroyed

Akademie der Wissenschaften, Vienna

Fireproof Curtain

Silicotungstic Acid as a Reagent for Alkaloids

Wearing Properties of Aluminium

The Joyote of Mexico

By Alfonso Herrera

Bacteria, and what Will Kill Them

Xanthium Spinosum

Vegetable Coloring Matters

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