SA Supplements

Altitudes of Railways above Sea-Level

The German Beer Industry

Armored Trains in South Africa

Japanese Paper

Cycle Construction and Design

Origin of the Word “Physician.”

The Homemade Windmills of Nebraska

The Development of the Arch Principle

Luminous “Vortex Rings.”

The Resistance of the Air

The Catalytic Process for the Manufacture of Sulphuric Acid

Armored Turrets

The Mors Carriage

Trade Suggestions from United States Consuls

Miscellaneous Notes

Trade Notes and Receipts

Selected Formulæ

The Canker Worm

Phylogeny of Rust

Kauri Gum

Struck by a Fragment of a Meteor

Why is the Negro Black?

Preservatives and Dyes in Articles of Food

A New Trade Route to Siberia

A Novel Trap for Cockroaches

Patents!

Car Lighting with Pintsch Gas, City Gas and Acetylene Mixture

New Books Etc.