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57 manuscript pages and one plate showing a diagram of the curvature of the Indian arc.

Subject: Geodesy

Published in Philosophical Transactions as 'On the Indian arc of meridian'.

Written by Pratt in Calcutta [Kolkata, West Bengal, India]. Communicated by Professor [George Gabriel] Stokes. Received by the Royal Society on 3 September 1860. Read 22 November 1860.

Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 10, 1860.

Reference number
Earliest possible date
19 July 1860
Physical description
Ink on paper
Page extent
58 pages

Creator name

John Henry Pratt

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John Henry Pratt, Paper, 'On the Indian arc of meridian' by [John Henry Pratt], 19 July 1860, PT/62/4, The Royal Society Archives, London,, accessed on 18 July 2024

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  • Philosophical Transactions

    Dates: 1802-1865

    The 'Philosophical Transactions' collection comprises manuscript versions of papers published in The Philosophical Transactions of the Royal Society, the world’s first and longest continuously running journal dedicated to science.

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