(source)
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John B. Henck
(20 Oct 1815 - 3 Jan 1903)
American civil engineer and classicist who wrote the well-respected Field-Book for Railroad Engineers (1854). His career began as a professor of Latin and Greek, but in 1847, he turned to the study and construction of railroads. He was professor of civil engineering at Massachusetts Institute of Technology from 1865 until his retirement in 1881.
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Science Quotes by John B. Henck (1 quote)
Henck's Field-Book for Railway Engineers
(source)
Rules can seldom be safely applied without a clear understanding of the principles on which they rest.
— John B. Henck
From Field-Book for Railroad Engineers (1854), Preface, vii.

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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