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A Little Knowledge is a Dangerous Thing
Published online by Cambridge University Press: 03 November 2016
Extract
About 1901 I saw something of a member of the firm which was laying out at South Harrow what is now known as the Piccadilly Line.
He explained to me how they marked out the central line and how on curves they used sighting posts well away from the central line.
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- Copyright © Mathematical Association 1960