To Benefit by a Great Dam

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