Referee's report by William Thomson, Lord Kelvin, on two papers 'On the precession of a viscous spheroid, and on the remote history of the Earth' and 'Problems connected with the tides of viscous spheroid' by George Howard Darwin Recommended for publication in the 'Philosophical Transactions of the Royal Society'. As the author is visiting soon, the referee hopes to discus the papers with him and gain some clarification before writing a fuller report. Subject: Physics and Chemistry, Mathematics [Both papers published in the Philosophical Transactions of the Royal Society, 1879] 13 May 1879