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Features

The Defense of Ports by Means of Electric Torpedoes

Torpedo Observing Station

The Mechanic Arts Abroad and at Home

By Coleman Sellers

How to Measure the Efficiency of Steam

Recent Patterns of Portable Engines

The Krupp Works at Essen

Natural Gas

British and Metric Measures

Phosphates from Slag

Non-Actinic Light for the Dark Room

Chemical Action from a Capillary Tube

By R. S. Dale

Properties and Constitution of Sea-Water

By M. Antoine de Saporta

Methylene

Improved Cloth Tentering and Pressing Machine

The Sources of Electricity

Influence of Civilization on Eyesight

Jamieson's Electrical Governor

Nature's Hygiene

Professor Ewing on “Healthy Houses”

The Pottery of the Mohawk Indians

The Horse of Kabah

Its Value as a Proof that the Ruined Cities of Yucatan are of Modern Construction

Do Plants Vary when Propagated by Cuttings?

By Peter Henderson

The Leaf-Eating Ant

Growth of Weeds on Ships

High Tension Current Dynamos

Pinus Lambertiana

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March 14, 1885

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