The Defense of Ports by Means of Electric Torpedoes

The Mechanic Arts Abroad and at Home

Torpedo Observing Station

How to Measure the Efficiency of Steam

Recent Patterns of Portable Engines

The Railway and Port of Reunion Island

The Krupp Works at Essen

Natural Gas

British and Metric Measures

Non-Actinic Light for the Dark Room

Phosphates from Slag

Methylene

Properties and Constitution of Sea-Water

Improved Cloth Tentering and Pressing Machine

Chemical Action from a Capillary Tube

The Sources of Electricity

Influence of Civilization on Eyesight

Jamieson's Electrical Governor

Professor Ewing on “Healthy Houses”

Nature's Hygiene

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

The Leaf-Eating Ant

Do Plants Vary when Propagated by Cuttings?

Growth of Weeds on Ships

High Tension Current Dynamos

Pinus Lambertiana