Referee's report by John Allen Harker, on a paper 'The capacity for heat of metals at low temperatures' by Ernest Howard Griffiths Sectional committee: Physics and chemistry Recommended for publication in Philosophical Transactions, in full. It is a 'most important' paper, which will become a 'classic of the subject'. [Published in Philosophical Transactions A, 1914]. Endorsed on verso as received 25 April 1913. April 1913