Referee's report by Edward Frankland, on a paper 'Observations on several mineral substances, including their analysis, &c' by Thomas Lamb Phipson Not recommended for publication in the 'Philosophical Transactions of the Royal Society'. The investigation is of a commercial nature. The substances are mixtures and not in their pure form. Refers to work by Sledzinski/Zledzinski [?]. Some of the minerals have previously been described in other publications. Subject: Geology, Physics and Chemistry [Published in the Proceedings of the Royal Society of London, 1863] 10 January 1863