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Features

Altitudes of Railways above Sea-Level

The German Beer Industry

Japanese Paper

Armored Trains in South Africa

Cycle Construction and Design

By Archibald Sharp

Origin of the Word “Physician.”

The Homemade Windmills of Nebraska

By Erwin Hinckley Barbour

The Development of the Arch Principle

Luminous “Vortex Rings.”

The Resistance of the Air

The Catalytic Process for the Manufacture of Sulphuric Acid

By Frederick H. McGahie

Armored Turrets

The Mors Carriage

By Velox

Miscellaneous Notes

Trade Notes and Receipts

Selected Formulæ

The Canker Worm

By Grant Allen

Kauri Gum

Phylogeny of Rust

A New Trade Route to Siberia

Why is the Negro Black?

Struck by a Fragment of a Meteor

Preservatives and Dyes in Articles of Food

A Novel Trap for Cockroaches

Car Lighting with Pintsch Gas, City Gas and Acetylene Mixture

Patents!

Departments

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January 20, 1900

Think Outside the Gift Box