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Features

"The Heavens Declare the Glory of God"

How a Group of Enthusiasts Learned to Make Telescopes and Became Amateur Astronomers

By Albert G. Ingalls

Tests Fail to Confirm Transmutation to Gold

A Report of the Scientific American Gold Test

Every Crime is Entrenched Behind a Lie

How the Lie Is Punctured and the Criminal Exposed Is Described in This Interview Withthe Noted Criminologist, Edward O. Heinrich

By Tom White

The Tragedy of the "Shenandoah"

The Wrecking of This Superb and Well-tried Ship by a Furious Thunderstorm

By J. Bernard Walker

Fighting Disease With Aniline Dyes

Physicians Have Found a New Way to Reach and Combat Some Microbes

By Nell Ray Clarke

Nova Pictoris--A Temporary Star

Professor of Astronomy at Princeton University Research Associate of the Mount Wilson Observatory, California

By Henry Norm Russell

Controlling a Million Horsepower

Why Hair Turns Gray

A Study of the Developing Hair Through the Microscope Reveals the Secrets ofColor Production and Color Loss

By Leon Augustus Hausman

An Invisible Police Alarm

Radio Is Proving Its Usefulness in the Form of a Powerful Weapon Against Criminals

By Orrin E. Dunlap Jr.

The Progress of Medical Science--II

The Discovery of Insulin and the New Ductless Gland Therapy

By Morris Fishbein

The Amazingly Accurate Calendar System of the Maya Indians

With the Aid of a Remarkable Mathematical System These Early Americans Determined the Equinoxes and Closely Predicted Eclipses of the Sun and Moon

By James C. Bardin

Another Victory for Oil Equipment

A Diesel Engine Installation With Greatest Flexibility and Ease of Operation, in a Most Demanding Service

By Louis S. Treadwell

Linking Mexico and California

Unbroken Rail Journey from San Francisco to Mexico City, Will Soon Be Possible

By George F. Paul

Have We Too Many Traffic Laws?

The Difficulties of Enforcement from the Traffic Officer's Point of View

By James W. Bayless

What is a Gynandromorph?

How One Insect Combining Both Sexes Resulted from an Accident to Its Sex Chromosomes

By James W. Mavor

The Short-lived, Eight-foot Flower of Sumatra

Photographs Courtesy of Gardener's Chronicle

News for Inventors, November 1925

A Department of Facts and Notes of Interest to Patentees and to Owners of Patent and Trademark Rights

By Milton Wright

The Heavens in November 1925

By Henry Norris Russell

Departments

  • Departments

    Our Point of View, November 1925

  • Inventions New and Interesting, November 1925

  • Recently Patented Inventions, November 1925

  • The Scientific American Digest, November 1925

  • Learning to Use Our Wings, November 1925

  • In The Editor's Mail, November 1925

  • Science and Money, November 1925

  • Radio Notes, November 1925

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November 1925

Think Outside the Gift Box