Detailed referee's report by Thomas Preston, on a paper 'The thermal expansion of pure nickel and cobalt' by Alfred Edwin Howard Tutton Not recommended for publication in the 'Philosophical Transactions of the Royal Society'. The instrument and method have already been described at great length by the author in the Philosophical Transactions. The obtained results would have been all that was required. The abstract should be published in the Proceedings. 'The value of the paper lies entirely in the accuracy of the coefficient of expansion obtained'. Subject: Physics / Chemistry [Published in the 'Proceedings of the Royal Society of London'] 15 May 1899