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A Botanical Exploration of Cuba

A Great California Seed Farm

Pepper Cultivation in India

The Habitability of Mars

By Leigh Page

The Mechanical Sorting of Postal Packages

The Value of Imported Gems

Mechanical Stokers

By Edwin Fitts

New Views of the Constitution of Matter

By F. C. Robinson

On Polonium and the Inducing Character of Radium

By F. Giesel

The Transmission of a 23,000-Volt Direct Current over a Distance of Thirty-Five Miles

By Emile Guarini

Mortar

How to Embellish Cheap Furniture

Totemism

By A. C. Haddon

Changes in Japanese Character Writing

The Production of a Black Color on Brass

By Erwin S. Sperry

The Serpollet Steam Automobile

The Nernst Incandescent Lamp

Lime Culture in the West Indies

The Roman Foot in Measuring

Engineering Notes

Trade Notes and Recipes

Proportions in Architecture

Trade Suggestions from United States Consuls

Selected Formulæ

Departments

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August 29, 1903

Complex Causes. Alternative Solutions.

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