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Features

Bange's Artillery System

II.—Siege and Fortress Guns

Planetary Wheel-Trains

By C. W. Maccord

Profiling Machine

Proposed Suez Ship Rail Way

Auber's Tubular Boiler with Movable Fire-Box

Notes on Pharmaceutical Apparatus

By Charles Symes

Lawrence's Capillary Coolers

The Play of the Needle

The Great Discoveries in Electricity

Retort and Condenser

History of the Electric Telegraph

The Drawbaugh Telephones

The Source of Atmospheric Electricity

How to make an Incubator

Prof. Heyer on Comets

Submarine Explorations

Two useful Problems

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May 17, 1884

Think Outside the Gift Box