This event has finished Took place on: Thursday, 27th Mar 2014
Free FreeDuring the 19th century the Great Trigonometrical Survey conducted the longest measurement of the earth’s circumference ever attempted.
Presenter John Keay explores their epic undertaking which took 50 years to complete, at great expense and loss of life.
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This event has finished Took place on: Thursday, 27th Mar 2014
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2014-03-27 2014-03-27 Europe/London The Great Arc: Military Map-makers in India A talk about the Great Trigonometrical Survey -- the longest measurement of the earth’s circumference ever attempted. https://www.ianvisits.co.uk/calendar/2014/03/27/the-great-arc-military-map-makers-in-india-41024 ,,, Meeting point to be confirmedWhat else is hapening in London on 27th Mar 2014
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