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Features

English Motor Omnibuses for City and Country Use

By Our English Correspondent

The Tunnels of the World

Contemporary Electrical Science

Concrete

By Brysson Cunningham

An Island Prison on the Forth

Masterpieces of Watchmaking

Torsion Meter for Recording the Horsepower of Steam Turbines

By the English Correspondent of the Scientific American

The use of Bronze Castings for Naval Purposes

By Alfred Gradenwitz

A Sample Taker for use in Dredging Operations

By the English Correspondent of Scientific American

Some American Contributions to Technical Chemistry

By Marcus Benjamin

The Construction of a Silvered Glass Telescope, Fifteen and a Half Inches in Aperture, and its use in Celestial Photography.—I

By Henry Draper

The Constituents of Gutta-Percha

By A. Tschirch and O. Muller

Selected Formulæ

Electrical Notes

Engineering Notes

Departments

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    July 29, 1905

    Think Outside the Gift Box