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Patents and their Purpose

Notes of Historic Interest

By Jeremiah Lee MacAuliffe

Engineers' Difficulties with Tropical Telephones

The Value of Birds to Man

The Prismatic Compass

How it Works and Some of its Advantages


Notes on a Visit to a Country Inaccessible to Europeans

By Henry John Elwes

The Combustion of Coal in Boiler Furnaces

British Shipping Tonnage

Freight Carrying on the Great Lakes

Where Immense Quantities of Grain, Ore and Coal Are Moved in Bulk

By Day Allan Willey

Utilizing Wastes in Canning Pineapples

Atoms and Ions—VI

A Comprehensive Discussion Especially as Related to Gases

By J. J. Thomson

Safety in Good Lighting

Scientific Aeronautic Research

The New Aerodynamic Laboratory of the Massachusetts Institute of Technology

By J. C. Hunsaker

Development in Electromagnetism—II

A Review of Some Important Problems, and Laboratory Results

By Eugene Bloch

New Instruments of Precision

The Problem of the High Building

By Charles Peck Warren


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