Volume 130, Issue 6
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Features
Inside the Earth, and Out
Conditions in the Rock Crust That Lead to Earthquakes
Photographs of the Inner Body
The Criminal as an Inventor
Some Curious Contrivances of the Oblique Mind that Have No Prototype in Legitimate Technology
Taking the Stenches Out of Industry
The Embarrassments of Left-Handed Perfumery, and How They Are Often Eliminated
Here and There, June 1924
Telepathy and Radio
Results of the Scientific American Test of Thought Transference from the Broadcasting Studio
Our Abrams Investigation--IX
Results of Tests with Genuine E.R.A. Apparatus and Genuine E.R.A. Technique
Getting Together on the Traffic Problem
The April Conference, at Yale, of Those Expert in All Its Branches
The Locomotive of the Future
The Blast Factory
From Raw Materials to Finished Product in the World's Largest Dynamite Plant
Railway Ties of Concrete for India's Railways, Disappearing Searchlight Towers and more
Studying Fire Risks from Sample Fires
How the Behavior of Columns and Beams Under Exposure to Conflagrations Is Determined in the Laboratory
Torpedo Attack by Airplane, Ferry Boats with Turbo-Electric Drive
Color in Nature
Coal and Coal Tar
Sydney Harbor Bridge
Fighting the Bed Bug
How a Bitter and Dangerous Enemy of Mankind Is Being Routed With Such Weapons as Propaganda and Poison Gas
A Gasoline Engine that is Different, Electric Light Extremes and more
The Largest Map in the World
A Monster Model, in Relief, of the Entire State of California
The Rotary System of Oil-Well Drilling
A New Portable Microscope for Use in the Shop, An Old Canal Put to Use and more
The Story of Steel--VI
Open-Hearth Furnace, Making a Superior Steel, Supersedes the Bessemer Converter
Birds and Sewage Disposal
An Interesting Relationship Involving the Relief of a Filtration-Plant Nuisance
Fighting Forest Fires with Radio and Plane, Psychology and Criminal Responsibility and more
Uncle Sam's High-Priced School, The War Department Radio Net
Safety of Life and Limb
The Sky by Day
Solved and Unsolved Problems Which It Places Before Our Eyes
New Ideas of Prehistoric Flora, A Tree with Engineering Judgment and more
Snowslides
Some Facts about Their Menace and Their Prevention