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Coal Handling for Large Boiler Plants

Measures the Bridge Strain

An Instrument that Indicates One Pedestrian's Footfall

Electricity from Carbon without Heat

By Willard E. Case

Metallurgical Applications of Electric Heating

Boron Bronze

By H. N. Warren

Engineering Notes

Electrical Notes

Miscellaneous Notes

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

By Robert Grimshaw

Selected Formulæ

Briquettes from Culm Heaps

Making Clean Castings

Portable Automatic Oxygen Generator

Preparation of Papers for Preserving Goods or Articles Wrapped in Them

The Confessions of a Cocainist

Women Bicycle Racing in London

Change of Air—The Science of It

By Louis Robinson

The Manufacture of Tartaric Acid

A Hygienic View of Wood Paving

Models of the United States

By Cosmos Mindeleff

Transmutation in Minerals-Gems Manufactured from the Natural Constituents

Ruins of the Great Zimbabye

The Identification of Botanical Specimens


Determinations of High Temperatures


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