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Are Modern Cars Safe?

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

By Alexander Klemin

Stabilizing the Rio Grande

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

By L. M. Lawson

A Weapon for Inventors

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

By Orson D. Munn

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

By Henry Norris Russell

Aircraft Grow Larger

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

By Reginald M. Cleveland

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?

By Sophie Wilds

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. He began theoretical work in 1912 when an instructor in physics at Princeton, patented a "rocket apparatus" in 1914 (U.S. Patents No. 1,102,653 and 1,103,503), made actual experiments in 1915 when an assistant professor of physics at Clark University, and in 1919 the Smithsonian Institution published his first progress paper, "A Method of Reaching Extreme Altitudes," describing his preliminary experiments. He is now Director of the Physics Laboratory at the same university. The accompanying paper is published by permission of the Smithsonian Institution, and is Dr. Goddard's second official progress paper on his work. It is conservative; the author never has been inclined to rush into print with hopes and great expectations, and even now he describes only what has actually been accomplished in his experiments. In a recent editorial comment, Nature (London), the world's foremost non-popular journal of general science, states: "It is good to hear that such experiments are being carried out, and the sober objectivity of Dr. Goddard's work presents a sharp contrast to the unscientific imagination exhibited by those who seek to direct attention to the advent of interplanetary travel before the preliminary investigations that might throw light upon its possibility or otherwise have been completed." Some other writers on rocketry are far ahead of Dr. Goddard and almost, in fact, on Mars already-in books.—The Editor.

By Robert H. Goddard

Conditioned Air?

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

By Philip H. Smith

Misinterpreted Animal Observations

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

By S. F. Aaron

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!

By Joseph Lynch S. J.


  • 50 Years Ago in Scientific American, August 1936

  • Recommended

    Books Selected by the Editors, August 1936

  • Departments

    Griffith Observatory and Planetarium

  • Our Point of View, August 1936

  • A Steam-Driven Elephant, "Rubber" to New Guinea and more

  • Current Bulletin Briefs, August 1936

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Introducing Scientific American Health & Medicine

Introducing Scientific American Health & Medicine