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Features

The Egyptian Obelisk in America

Hodson's Rotary Engine

Improved Rotary Valve Gear

Improved Lubricator

The Proposed New Bridge over the Douro

Perspective Carriage Draughting

By Adolphus Muller

The Driving of Nails

Brewing in Austria

The Native Silks of Assam

By C. G. Warnford Lock

Artists' Homes.–No. 9

Bethnal Green Museum, London

By F. T. Aschmann

Josiah Timmis Smith, C.E

Reversal of the Image

Climatic Changes in Asia

Sword vs. Lance

Pike's Peak a Volcano

An Essay on the Natural Enemies of the Telephone

By T. D. Lockwood

New Electric Motor

By William Woodnutt Griscom

Combined Induction Machine

Spiral Polarization

On the Limit of Planetary Stability

By Daniel Kirkwood

Pandermite: A New Boracic Mineral

By C. G. Warnford Lock

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    February 12, 1881

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