Prodigal Mother Nature
By Cross-breeding and Persistent Selection the Plant Breeder Speeds Up Nature's Slow, Wasteful Hit-or-miss Methods of Producing New Species a Thousand-fold
Volume 134, Issue 6
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Features
How to Observe the Great, New Sun Spots
And We Call Ourselves Efficient
The Internal Heat of the Earth
The Center of the Earth--What We Know of Its Temperature, Structure and Its Composition
The Great Crimson Aurora of March 9, as Seen Over the City of London
Mileage Goes Up in Smoke
Uncle Sam, Spendthrift--II
Shall the "Wildcatter" Wreck Our Oil Resources as the Lumberman Has Wrecked Our Forests?
Houses Built in Twenty-four Hours!
The Hydrostatic System of Trees
The Force that Draws Tons of Sap to the Topmost Branches of Trees Is the Evaporation of Water from the Leaves
The Applied Science of Public Spending
Through an Effective Budget System Our Government Is Saving Millions This Year
Budding Scientists
A Nation-wide Organization Is Training Our Future Leaders in Research Work
Odd Pieces of Change
A Weird Miscellany of Queer-shaped Coins Have Been the Forerunners of the Round Flat Money of Today
X Rays and Atoms
By Means of Crystals or Powders the X Rays Are Diffracted or Reflected in Definite Patterns. These Enable the Analyst to Deduce the Arrangement of the Atoms Within the Crystals
Eavesdropping on the Arctic
Radio Fans Will Comb the Ether for Messages from the Aviator-explorers Racing to the Pole
The Manufacture of a Battleship's Turret Guns
From the Molten Steel in the Furnace to the Finished Gun on the Ship
Annapolis
The Famous College Where Our Future Admirals Receive Their First Training
Oil Engine in a New Field
Performance of Powerful Diesel-Electric Dredge, Port of Portland
Something New in Gas Holders
Details of a Waterless, Non-telescopic Gas Holder at Michigan City, Indiana