Referee's report by Carl Frederick Abel Pantin, on a paper 'The control of beating and of micro-fibrillation by means of potassium, calcium and sodium in the chick embryo heart potassium fibrillation' by P D F Murray Sectional committee: Zoology Not recommended for publication. The paper should be re-written as it is difficult to follow in its present form. A bibliography should be added. There are no references to the author's previous papers on this subject. If it is irrelevant, it should be confirmed why. [Published in Proceedings of the Royal Society B, 1938]. Endorsed on verso as received 17 February 1938. February 1938