Are Modern Cars Safe?

The Driver is Usually to Blame, Engineering Developments Promote Safety and Comfort, How Streamlining Fits Into the Scheme of Things

Stabilizing the Rio Grande

Meandering International Border Is Being Straightened, Canals, Levees Involved, Two Countries Exchange Territory, Prevent Future Damage

A Weapon for Inventors

Who Was First? Inventors Rights Must be Backed by Legal Evidence, How to Obtain It

Granules of the Solar Photosphere

Why the Sun's Surface Looks as if it Were Bumpy, Granules Found to be About 2200 Miles in Diameter, 100 Degrees Hotter Than the Remainder

Aircraft Grow Larger

Efficiency Increases With Size . . . 55-Ton Flying Boats Designed . . . 80-Ton Next . . . Promenade Deck in Wings . . . Daily Service to Europe

Fighting Fungi with Fire

Bronze Age Blondes

Ancient Wooden Coffins in Denmark . . . Buried for 3000 Years . . . Dress, Art, and Customs Revealed . . . Tannic Acid Kept the Treasure Intact . . . Priestess?

Liquid-Propellant Rocket Development

THE author of the accompanying article is the dean of scientific experimenters on the high efficiency rocket as a means of propulsion wholly independent of the air—a reaction motor...

Conditioned Air?

What is Air Conditioning? . . . Newer Concepts . . . Present Status . . . Design Trends . . . Complex Problems of Heating, House Insulation Involved

Misinterpreted Animal Observations

Things which Have Been Considered Detriments in Protective Coloration are Actually Protective in the Highest Sense—to the Helpless Young

Recent Progress in Earthquake Science

What Actually Causes Earthquakes? How Deep Do They Originate? Is The Earth's Core a Solid or a Liquid? The More We Learn the Less We Know!