Paper, 'On the temperature of the springs, wells and rivers of India and Egypt, and of the sea and table-lands within the tropics, with a few remarks on Mr Boussingault's mode of ascertaining the mean temperature of equinoctial regions' by Capt [Thomas John] Newbold Letter from Newbold regarding this paper as well as observations published as part of paper found at PT/29/1i. Subject: Geodesy Published in Philosophical Transactions as 'On the temperature of the springs, wells and rivers of India and Egypt, and of the sea and table-lands within the tropics'. Received by the Royal Society on 1 January 1842. Read 22 February 1844. 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 5, 1851. [1842]