Referee's report by John Allen Harker, on the Bakerian Lecture 'Experiments on the artificial production of diamond' by Charles Algernon Parsons Sectional Committee: Physics and Chemistry Recommended for publication in the 'Philosophical Transactions of the Royal Society. The purpose and description of the experiments is not made clear. Refers to work of Otto Lummer. Is willing to pass a copy of Otto Lummer's work to the author if desirable. [Published in the Philosophical Transactions of the Royal Society A, 1920] Endorsed on verso as received 25 October 1918. [October 1918]