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Features

Coal Handling for Large Boiler Plants

Electricity from Carbon without Heat

By Willard E. Case

Measures the Bridge Strain

An Instrument that Indicates One Pedestrian's Footfall

Metallurgical Applications of Electric Heating

Boron Bronze

By H. N. Warren

Electrical Notes

Miscellaneous Notes

Engineering Notes

How to Retouch, Improve and Treat Negatives, Positives and Photographs

By Robert Grimshaw

Selected Formulæ

Briquettes from Culm Heaps

Preparation of Papers for Preserving Goods or Articles Wrapped in Them

Portable Automatic Oxygen Generator

Making Clean Castings

The Confessions of a Cocainist

Women Bicycle Racing in London

Change of Air—The Science of It

By Louis Robinson

A Hygienic View of Wood Paving

The Manufacture of Tartaric Acid

Models of the United States

By Cosmos Mindeleff

Ruins of the Great Zimbabye

Transmutation in Minerals-Gems Manufactured from the Natural Constituents

The Identification of Botanical Specimens

Determinations of High Temperatures

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    March 20, 1897

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