Paper, 'On the errors in longitude as determined by the chronometers at sea, arising from the action of the iron in the ships upon the chronometers' by George Fisher Letter from George Coleman to George Fisher that accompanies this paper found at PT/14/19. Subject: Navigation Published in Philosophical Transactions as 'On the errors in longitude as determined by chronometers at sea, arising from the action of the iron in the ships upon the chronometers'. Communicated by John Barrow. Read 8 June 1820. 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 2, 1833. [1820]