What Causes and What Cures Fatigue?
Recent Remarkable Experiments by Professor A. V. Hill that Show How the Chemical Called Lactic Acid Controls the Action of Our Muscles
Famous German Sail-less Ship Driven by Same Wind Forces that Make Base Ball Curve
Do Not Miss Seeing the Solar Eclipse
The American Astronomical Society and the Scientific American Ask Certain Public Cooperation, as Explained on the Following Pages. On This Page Professor Russell Tells You Something of What This Greatest of Natural Spectacles Will Be Like
Eclipse Investigations not Requiring Special Equipment
Our Own Radio Investigation
By the Eclipse Editor of the Scientific American
Mountains Made to Order
Glass Foregrounds Now Used in Hollywood Studios Instead of Expensive and Tiresome Trips to Strange Locations
Can Huge Dirigibles Supplant Our Ocean Liners?
The First of Three Articles on the Possibilities of the Giant Rigid Dirigible
Common Accidents Easy to Avoid
New Bridge Saves Time
A New Niagara of Subterranean Power
Will We Find Hidden Sources of Power in the Earth's Inner Fires?
A Race with Nature
A spectacular engineering feat is the construction of the great Sennar Dam, on the Blue Nile, in the Sudan. Here the engineer has been wrestling with the Nile floods and by herculean efforts is erecting an immense barrage, two miles in length, across the river, in order to hold up water for the irrigation of a million acres of parched land, where cotton is to be grown by means of hundreds of miles of canals.
Methods of Testing Chauffeurs
Tests for Determining the Caution and Fear-Reaction of Men Who Have Charge of Motor-Driven Vehicles
The Psychic Investigation
Report of Progress from Margery's Point of View
The Size of the Universe
The Third of a Series of Articles on the Real Nature of the World
Jewels in the Eyes of Insects
Some Marvelous and Brilliant Optical-Devices of Nature's Making
Which Radio Set to Buy
This Department Inaugurates a New Service to Our Readers
The Scientific American Annual Automobile Guide, January 1925
What Should We Expect of Tomorrow's Motor Car Developments?
Inventions New and Interesting, January 1925
Recently Patented Inventions
The Scientific American Digest, January 1925
Notes and Queries, January 1925
The Heavens in January 1925
Learning to Use Our Wings
Radio Notes, January 1925