Paper, 'On the nature of the forces concerned in producing magnetic disturbances' by Balfour Stewart Note by William Thomson published within this paper found at PT/66/5. Subject: Geodesy Published in Philosophical Transactions as 'On the nature of the forces concerned in producing the greater magnetic disturbances'. Written by Stewart at the Kew Observatory [London]. Received by the Royal Society on 14 June 1862. Read 19 June 1862. 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 12, 1863. 13 June 1862