Referee's report by William Odling, on a paper 'On the coefficients of expansion of the di-iodide of lead, PbI2, and of an alloy of iodide of lead with iodide of silver, PbI2.AgI' by G F Rodwell and Alexander William Williamson Recommended for publication in the Proceedings of the Royal Society of London. The paper appears to act as an appendix to the papers already published in the Proceedings. If the paper had been presented as a whole, rather than in successive parts, it would have been recommended for the Philosophical Transactions. The woodcuts should be included. Subject: Physiology [Published in the 'Proceedings of the Royal Society of London', 1881] 15 June 1881