You searched for City|State: coplay, pa
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historicalmarkerproject/markers/HM1LTT_saylor-park-welcome_Coplay-PA.html
David Oliver Saylor was born on October 20, 1827 in Hanover Township, Lehigh County. In 1866, he organized the Coplay Cement Company for the manufacture of natural cement. He soon began experiments to produce Portland cement in 1871. He was grante…
historicalmarkerproject/markers/HM1LTS_the-schoefer-kilns_Coplay-PA.html
Portland cement is essentially an artificial product. It is made by burning various minerals in a kiln at intensive heat to produce clinker. The upright dome kiln was the first type used in America. An improvement was the Schoefer vertical kiln wi…
historicalmarkerproject/markers/HM1LTQ_discovery-of-portland-cement_Coplay-PA.html
The modern cement industry began in 1756 when John Smeaton, an English engineer succeeded in producing a hydraulic cement that would harden under water. In 1824, Joseph Aspdin, an English bricklayer, produced a new cement by burning chalk and clay…
historicalmarkerproject/markers/HM1LTP_lehigh-valley-rock-suitable-for-hydraulic-cement_Coplay-PA.html
In the Lehigh Valley rock suitable for hydraulic cement had been found near the present locations of Palmerton and Northampton when the Lehigh Canal was built. Mills to produce hydraulic cement were erected at these sites before the Civil War. It …
historicalmarkerproject/markers/HM1LTO_coplay-made-cement-cement-made-coplay_Coplay-PA.html
In 1900, the scene before you was a smelly, dirty, noisy inferno. Trains roared in, carrying coal from the nearby northern anthracite fields and local cement rock, a form of limestone. Day and night smoke and dust belched from the towering kilns. …