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A Little Knowledge is a Dangerous Thing

Published online by Cambridge University Press:  03 November 2016

A. W. Siddons
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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.

Type
Research Article
Information
The Mathematical Gazette , Volume 44 , Issue 347 , February 1960 , pp. 1 - 2
Copyright
Copyright © Mathematical Association 1960

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