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Launch of the French Ironclad Le Hoche

Triple Expansion Marine Engines

Voussoir Calculation and Measurement

By C. Powell Karr

Massick & Crookes' Hot Blast Fire Brick Stove

Recent Improvements in the Manufacture of Rifle Barrels

The “Morgan” Miner's Safety Lamp

Simple Experiments in Polarized Light

By Geo. M. Hopkins

A Limit to the Height of the Atmosphere

By Henry A. Mott

Effect of Electricity on Fine Balances

The Langhaus Battery

Determination of Nitrogen in Coal and Coke


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