Portland Cement Quotes (2 quotes)
Engineering, too, owes its most useful materials to the achievements of chemists in identifying, separating, and transforming materials: structural steel for the framework of bridges and buildings, portland cement for roadways and aqueducts, pure copper for the electrical industries, aluminum alloys for automobiles and airplanes, porcelain for spark plugs and electrical insulators. The triumphs of engineering skill rest on a chemical foundation.
In Fundamental Chemistry, and Elementary Textbook for College Classes (1936), 8.
We may almost say of him [Joseph Aspdin, inventor of Portland Cement] what the epitaph in St. Pauls Cathedral says of Sir Christopher Wren: “If you seek his monument, look around.”
In the Vancouver newspaper, 'The Sun's School Service: Portland Cement', The Vancouver Sun (14 Jan 1937), 12. No writer identified; part of the Sun-Ray Club feature “Conducted by Uncle Ben.”
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) --
Carl Sagan
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