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Electric Power Installation near Butte, Montana

Electrolytic Manufacture of Zinc

Liquid Fuel for Steamships

By Edwin L. Orde

The Chemical Factor in Human Progress

By Peter T. Austen

A Parisian Puppet Theater

Dredging for Gold

The Protected Cruiser “Des Moines.”

History of Cold and the Absolute Zero

By James Dewar

An Evil Consequence of the “Pince-Nez.”

Man as a Heat Engine

By K. Schreber

French Infant Mortality


The Spider-Hunters

A New Telephone Relay

Personal Narrative by Capt. Sverdrup of his Arctic Trip

Selected Formulæ


Trade Suggestions from United States Consuls


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    October 18, 1902

    20% Sitewide for President's Day