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A Proposed War Balloon

English and French Armor-Clad Ships

Engineering Progress in 1884

American Dredgers and Excavators

Triple Ships

Improved Calculating Machine

On the Purification of Water by Iron on a Large Scale

By W. Anderson

The American Oil and Gas Fields

By James Dewar

The Preparation of Hyposulphurous Acid, and its use in the Developer for Dry Plates

Slate Roof Coverings

New Mode of Building Sustaining Walls

The Hooping of the Dome of St. Peter's, Rome

A New Fire Alarm

Gime's Accumulator

Jablochkoff's Auto-Accumulator

The Forms of Vibrating Bodies

On the Conversion of Heat into useful Work

By William Anderson

Oranges in Palestine

The Treatment of Cholera

Treatment of Neuralgia by Neuber's Method


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July 18, 1885

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