The Great Arc: The Dramatic Tale of How India was Mapped and Everest was Named John Keay
Harper Collins, 2000
Rs 700

The Great Indian Arc of the Meridian, begun in 1800, was the longest measurement of the earth's surface ever to have been attempted. Its 1,600 miles of inch-perfect survey took nearly 50 years, cost more lives than most contemporary wars and involved equations more complex that any in the pre-computer age.

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