Georg Ernst Stahl 1660 - German physician and chemist. He came out with the phlogiston theory of combustion. He also explained related biological processes such as respiration, fermentation, and decay with the theory. Combustible objects, he said, were rich in phlogiston, and during combustion is lost.
William Shippen Jr. 1736
Henry Miller Shreve 1785
George Combe 1788
Enrico Betti 1823
Hermann Hellriegel 1831
Alfred Bernhard Nobel 1833
Oswald Avery 1877
William A. Mitchell 1911
Samuel W. Alderson, 1914
American physicist and engineer who invented the crash-test dummy used to test the safety of cars, parachutes and other devices.
Portland cement was patented by Joseph Aspdin, a stone mason in Yorkshire, England (UK patent No. 5022). He made it by burning finely pulverized lime and clay at high temperatures in kilns and grinding the mixture into a powder. This hydraulic cement would then harden with the addition of water. He named his invention “Portland cement” as it resembled the high quality building stone quarried on the Isle of Portland off the British coast.
About portland cement
Cements patents of Thomas Edison
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