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SCIENCE IN REVIEW; 'Radiant Conditioning' Heats or Cools a House By Playing Off Heat-Reflecting Surfaces

'SCIENCE IN REVIEW; 'Radiant Conditioning' Heats or Cools a House By Playing Off Heat-Reflecting Surfaces', New York Times

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Railroads before hymns

The big change

How it looked to the authors and illustrators of Harper�s

Oil cooking

Oil�A new industry

Steam balloons and bomb carriages

Plowing two-mile furrows

A Colorado sheep ranch

Geographical survey in the Sierras

The U.S.A. from the air

But the West has a future

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