Memorandum from Wiliam Edward Ayrton, on his paper with W R Cooper 'Variations in the electromotive force of clark cells with temperature' to the Secretary of the Royal Society The new rule imposed by the Royal Society appears to allow the authors the choice to offer the paper for Philosophical Transactions. Fellows should now be informed that a paper published in the Proceedings should now be no more than eight pages in length. Subject: Physics [Published in Proceedings of the Royal Society, 1895]. 29 January 1896