Volume 159, Issue 6
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Features
Must We Grow Old?
Lahoratory Research hy Noted Scientists Gives Ground for Some Hope that We Shall Ultimately Learn to Forestall Old Age, Even Live Eternally
The Earth's Pulse
How the Scientist Goes About the Interpretation of the Wavy Lines—Signatures of Earthquakes—Recorded on the Moving Drum of the Seismograph
Indian Petroglyphs Idle Scribblings?
Inside the Great Planets
There is Evidence that Matter Within SOle of the Greater Planets Exists in Forms and Conditions that Would Seem Bizarre to Dwellers on Our Earth
Grand Coulee Progresses
Monster Dam and Appurtenant Works Will Cost Over 376 Millions, Dimensions, Components, Progress of Work, Difficult Problems Met
Tools Must Be Fit
Hard Alloy; Cobalt, Chromium, Tungsten; Welded to Wearing Edges; Resists Wear; Withstands Heat; In Tools, Cuts Faster, Lasts Longer
Making New Atoms in the Laboratory
Many New Forms of Matter are Being Produced by Modern Research in Nuclear Physics, but Science Knows no Way to Transmute Matter Economically
Direct Curent Super-Power
Is High Tension D.C. Transmission Coming Soon? Engineer Discusses Its Advantages, Awaits Only Perfection of Apparatus, Almost Ready