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Uranium Optical Maser

Ours Is a Great Age Says Carnegie President

Plans for National Zoo

Meets Space Challenge

President’s Adviser

Erratum: Astronomical Events Give Clue to Mayan Calendar

Science Forecast for 1961

“Taking It Easy” Is Bad for Business Executives

Mamma What Moves First

Scraping Noise Found Worst Known to Man

Designs Suction Tube

Erratum: Nature Ramblings: Sumac