John Henry Pratt

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John Henry Pratt (June 4, 1809 - December 28, 1871) was a British clergyman and mathematician who devised a theory of crustal balance which would become the basis for the isostasy principle.

Pratt was born in London and educated as a mathematician at Cambridge University. While serving as the Archdeacon of India, Pratt arrived at his theory of crustal balance based upon a survey of India. He died in Ghazipur, India.

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