Referee's report by Joseph David Everett, on a paper 'On underground temperature; with observations on the conductivity of rocks; on the thermal effects of saturation and imbibition; and on a special source of heat in mountain ranges' by Joseph Prestwich Not recommended for publication in Philosophical Transactions, as it would be better suited to Proceedings. Despite the paper being 'controversial', it is also 'an able piece of controversy, elucidated by much research and valuable information'. Subject: Geology [Published in Proceedings of the Royal Society, 1886]. 2 May 1885