Paper, 'On the effect produced on the deviations of the compass by the length and arrangement of the compass needles and on a new mode of correcting the quadrantal deviation' by Archibald Smith and Frederick John [Owen] Evans Subject: Scientific Instruments Published in Philosophical Transactions as 'On the effect produced on the deviations of the compass by the length and arrangement of the compass-needles; and on a new mode of correcting the quadrantal deviation'. Received by the Royal Society on 13 April 1861. Read 18 April 1861. 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. [1861]