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Show It's New and Novel Filling each story of a building j with heat or cold from the floor up, without downward leakage, iong has been a temperature engineer's dream that now is said to be realized. real-ized. The feat is achieved by means of gravel and concrete embedded pipes laid on a bottom of insulating material. Basis of this temperature stalling stratum is a freakish ore called vermiculite. 'it's heated until ' the water trapped between number less tiny layers turns to steam and explodes the layers apart, leaving semi-microscopic air-cells throughout through-out the mass. |