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Features

The Manufacture of a Pneumatic Tire

Modern Explosives

Motor Vehicles for Heavy Traffic

Apparatus for Filtering Air and Smoke

Actinium: A New Radio-Active Element

By A. Debierne

Trade Notes and Receipts

Selected Formulæ

Trade Suggestions from United States Consuls

A Universal Boring and Tapping Machine

Rails

Paints and Varnishes

By A. H. Sabin

Lister's Inclinometer Theodolite

Bubonic Plague in the Bible

Mason Bees

Grindelia Patens

Hypnotism in Medicine

Apparatus for Lighting and Extinguishing Gas from a Distance

The Gold Deposits of Cape Nome

By Charles G. Yale

New Books

Patents!

Practical Conditions in the Application of Green Manures

Specific Gravity of the Human Body

By John C Packard

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    May 12, 1900

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