Volume 154, Issue 5
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Features
The 200-Inch Telescope
Observatory Design, A New Astrophysical Observatory, The Great Reflector, Auxiliary Devices, Purpose of the New Observatory...
Do Hatchery Trout Go Wild?
Restocking is the Trout Fisherman's Only Hope for the Future, Proper Methods, Results of Hatchery Experiments, It Can Be Done...
Cut Weight-Cut Cost
Welding's Rapidly.... Growing Importance, Used for Production, Patching, Repairs, Saves Weight and Thus Modifies Design Practice
A Catastrophe That Did Not Happen
Why the Billion-Ton Minor Planet which Recently Passed Closer to the Earth than Anything Ever Known to Astronomers did not Strike it, The Earth is Safe for a Long Time to Come...
Seeing in the Dark
Made Possible by the Electron Lens, Focuses Electrons as Glass Lens Focuses Light, Useful for Secret Signalling, Image Fidelity...
A Modern Port for Bordeaux
Advance Port at Ocean for French City, Wharf Piers Unique, Built on Land, Floated, Sunk, Engineering Problems, Channel Dredge...
Towing Tank
Tests Ship Scale Models
The Mystery of the Neutrino
A Particle or Entity which May Turn Out to be a Nonentity, The Law of Conservation Apparently Fails, What Scientists are Wondering
The Capital Ship's Structural Defense
Fairbottom Bobs
Oldest New common Engine, Salvaged, Shipped to America from England, Restored, Operating Once Again, A Mechanical Link with the Past...
Arctic Radium
Ores of the Canadian Arctic, By Air and Water and Rail to the South, Refined and Made Ready for Hospital Use Near Toronto...