In 1824 Joseph Aspdin invented Portland cement by burning finely ground chalk and clay until the carbon dioxide was removed. Aspdin named the cement after the high-quality building stones quarried in Portland, England. In the 19th Century concrete was used mainly for industrial buildings.
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I think design of this Cigarette ashtray is so beautiful
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Historically speaking, fist modern clock was created by German inventor Peter Henlein who introduced to the world Spring-driven clock around 1511.
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