Referee's report by John William Strutt, Lord Rayleigh, on a paper 'Colour photometry.—Part II. The measurement of reflected colours' by William De Wiveleslie Abney and Edward Robert Festing Recommended for publication in the Proceedings of the Royal Society of London. The paper is poorly written and some of the observations have little novelty. Subject: Physics and Chemistry [Published in the Philosophical Transactions of the Royal Society, 1888] [1888]