Can We Grow Our Own Rubber?
Guayule, a Native American Rubber-producing Shrub, Is Being Cultivated on a Large Scale in California.
A Mammoth Railroad Fill
Original Timber Trestle Is Replaced, First By Steel Bridge, Then By Massive Earth Fill
From the Scrap-book of Science--Camera Shots of Scientific Events, July 1928
Problems of Solar Research
Many Perplexing Puzzles Have Given Way to Astrophysical Research, but Enough Remain to Keep Astrophysicists Occupied
Man's First Mechanical Achievement
Ancient Man's Stone Implements Passed Through a Definite Evolution
Muskrats to Order
The Fur of These Once Lowly Rodents Now Forms the Basis of Profitable Farming Projects
How Old are the Everlasting Hills?
Dating the Geologic Age of Mountain Ranges Involves a Careful Investigation of Many Kinds of Evidence
Good Leather Now Made Faster By Discovery of How Lime Removes Hair From Prepared Hides
Where the Forest Meets the Laboratory
Glacial Age Man in New Mexico
Remarkable Discoveries Made in the West Again Raise the Question, "How Old Is Man in America"?
How the Weather Man Outreaches the Airplane
The Great Siberian Meteorite
An Account of the Most Remarkable Astronomical Event of the Twentieth Century, from Official Records
A Miniature Meteor Crater
A Circular, Crater-like Depression in Esthonia Bears at Least Superficial Resemblance to the Famous Crater in Arizona
An Analysis of Accident Causes, and Suggestions for Correction. Traffic Beacons and Safety Zones Can be Made of Great Value When Properly Placed
The Month in Medical Science, July 1928
A Review and Commentary on Progress in the Medical and Surgical Field
Who are the Mysterious Bearded Indians?--II
Many Scientists Believe that the Cultures of Central and South America Were Brought from the Old World by Oceanic Invaders Who Crossed the South Pacific in Canoes--The "Diffusionist" Theory
"Movie" Illusions--Their Creation
Is Concrete Better than Cross-ties?
Test Section of Rigid Roadbed, Used a Year, Shows Superiority Over Ballasted Track
Folding Boat, Automatic Bilge Pump and more
California's First Oil Well is Still Producing
Drilled in 1870, By the Spring-pole Method, the Well Still Yields About Four Barrels of Oil Daily
London's New Post-office Subway
Huge Radio Station at Croydon Serves British Airways
What is an Atom?
Our Point of View, July 1928
Detachable Wringer, Dish Washer and more
Track-Laying Barrow, Hack-saw for Sheet Metal and more
Visualizing Atomic Structures, Tall Buildings Protect Neighbors From Lightning and more
The Keystone "Pirate", Airship Hangars, and more
Removing Bootblack Stains, Oxygen Used to Fight Pneumonia and more
The Back Yard Astronomer
Perfect Reception in Hawaii, Custom-built Sets and more
The Heavens in July 1928
A Design of not a Product, Patents in Soviet Russia, and more