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Joseph Aspidin blue plaque
This blue plaque in Leeds, England, celebrates Joseph Aspdin who patented Portland cement in 1824.
Rights: Ben Dalton, Creative Commons 2.0
Published: 14 September 2016,Updated: 14 September 2016Size: 577.22 KBThis blue plaque in Leeds, England, celebrates Joseph Aspdin who patented Portland cement in 1824.
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