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Updated: May 7, 2025
All modern buildings follow practically one method of construction: a bony framework of steel or of concrete reinforced by steel filled in and subdivided by concrete, brick, hollow fire-clay, or some of its substitutes. To a construction of this kind some sort of an outer encasement is not only æsthetically desirable, but practically necessary.
He touched it and found it as hard as stone. "Fire-clay," he said. "That's probably worth something. I'll take a sample along." He dug away more top-soil and scooped out a big ball of clay. Then he filled in the holes he had made, covering up all traces of the clay deposit, and blazed a tree near by to identify the spot.
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