Paper, 'On magnetic calms and earth currents' by Charles V [Vincent] Walker 38 manuscript pages and one plate showing the arrangement of Walker's miniature observatory. Subject: Geodesy Published in Philosophical Transactions as 'On magnetic calms and earth-currents'. Received by the Royal Society on 3 February 1862. Read 13 February 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 11, 1862. 1 February 1862