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The Ruins of St. Mark's Campanile

Spencer's Cure for Garrulity

The First Magnetician

What the Microscope has Done

Purification of Drinking Water by Ozone According to the Siemens & Halske Process

Double Boring Mill

The Modern Bessemer Plant

A City Fuel Oil Pipe System

Effect of Propeller Pitch on Speed

Ocean's many Microbes

Platinum Discoveries

An Experience in a Gaseous Mine

The Role of Mosquitoes in the Dissemination of Diseases

By A. Dastre

“Crime” among Animals

Why are Sea Birds White?

The Harpoon-Foremost among Savage Inventions

By Otis Mason

Electrolytic Production of Metals, with Special Reference to Copper and Nickel

By WM. Koehler

Alcohol Lamp and Mirograph Projection Apparatus

Horn Lightning-Arresters with iron Framing

By Eugen Klein

Direct Combination of Chlorine with Carbon

Trade Notes and Recipes

Attar of Ylang-Ylang

New Green Coloring Substance Extracted from the Blood of Animals Poisoned with Phenylhydrazine

Trade Suggestions from United States Consuls

Selected Formulæ


  • Departments

    Patents - August 23, 1902

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