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The Ruins at Tebessa in Algeria

An African Relic of Roman Occupation

By Friedrick Schmid

Photodynamic Phenomena

Luminous Animals and Plants

By H. Von Tappeiner

History of Map making and Topography

With Illustrations of old Charts

By C. W. Larned

Water in Anthracite Mines

Titaniferous ore of Iron Mountain, Wyoming

Heavy Freight Trains

The Growth Of Car Capacity

The Control of Monitors

The Newman Kinematic Apparatus

A Contrivance Which Simplifies the Study of Mechanism

A Machine for Laying Rails in Streets

How Tracks can be Laid Without Impeding Traffic by the English Correspondent of the Scientific American

Unsolved Problems in the Design and Propulsion of Ships—II

Loading Watertight Compartments, and Stability

By Francis Elgar

Improvements in Edison's Secondary Battery

The Simplified Design of the New Cells

A Mammoth Cave Cathedral

Some New Discoveries of Interest

By Horace Carter Hovey

The Science of Measurement

Its Application to Astronomical Research

By David Gill

Engineering Notes

Trade Notes and formulæ

Electrical Notes


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