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Features

Notes on Manila and Cavité

Account of Dr. Peters' Recent Visit to the Ruins in Zambesia

Forest and Mineral Wealth of the Soudan

Precious Stones of New York

An Improved Continuous-Combustion Generator

The Designing of Automatic Machinery

By Hanson Robinson

The “Ideal” Saw-Guard

Trade Suggestions from United States Consuls

Miscellaneous Notes

Selected Formulæ

Trade Notes and Receipts

Natural and Artifiulal Rubber

The Victoria Regia

Archæological Discoveries at Carthage—I

Our Trade with Germany

A Century of Spade Work

The Chemistry of Cold Storage

By S. H. Hurst

Transportation Routes of the Western Hemisphere

Trade with the British West India Islands

Action of Light on Birds' Feathers

The Manufacture of Carbons

A Source of Intense Monochromatic Light

The Cost of a Train Mile

The Waste of Shipping

The Relations of Physics and Astronomy to the Development of the Mechanic Arts

United States Weather Bureau, Washington, D. C. viii. education in science and training in art are mutually helpful

By Cleveland Abbe

A New Glass, and its uses in the Arts

By William Dulles

Ivory Preserved in Cold Storage

Patents!

Departments

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    September 16, 1899

    Think Outside the Gift Box