Referee's report by Raphael Meldola, on a paper 'On a suggested relation between the refractive indices of pure metals and their molecular constants' by W Williams Sectional Committee: Physics and Chemistry Not recommended for publication in Philosophical Transactions. He does consider that there is a sufficiently well marked advance to constitute this a paper of Transactions rank. The points the author has established are interesting and, as far as they go important, but the abstract if printed in the Proceedings would make know all that is essential. [Not published] Endorsed on verso as received 17 April 1901. April 1901