Paper, 'On the diurnal variation of the magnetic declination at St Helena' by Lieut Colonel Edward Sabine Subject: Geodesy Published in Philosophical Transactions as 'On the diurnal variation of the magnetic declination at St. Helena'. Received by the Royal Society on 21 January 1847. Read 18 February 1847. 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. [1847]