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The Congo Railroad

High Explosives and Smokeless Powders and their Applications in Warfare

By Hudson Maxim

Notes on Repairs to Gas and Oil Engines

A New Rotary Steam Engine

Two-Spindle Vertical Milling Machine

Sand Blast for Cleaning Walls

Friction Clutches

Utilization of Indian Corn Stalks in Russia

Prehistoric Weaving in England

Cutting Waste Negatives for Cover Glass

By R. P. C.

The Value of Photographic Residues

The Mines of Ethiopia

Miscellaneous Notes

Engineering Notes

Selected Formulæ

Bull Fighting

Wages and Prices in America

The Need of College Men

Fortuitous Discovery

Feat of an Indian Fakir

A New Electric Sewing Machine

Arrangement of an Electro-Plating Plant

Roman Villas

Experiment Upon Inertia

An Aluminum Conductor

The Dicaiometer

The Liver

The Significance of the Garment

By Alice C. Fletcher

Drinking Water at Camp Thomas

Liquid Air


Stanhopea Madouxiana

The World's Copper Production and Consumption


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    September 24, 1898

    20% Sitewide for President's Day