Referee's report by John Newport Langley, on a paper 'On the occurrence of post-tetanic tremor in several types of muscle' by David Fraser Harris Sectional Committee: Physiology Not recommended for publication in the 'Philosophical Transactions of the Royal Society'. Suggests the paper is not sufficiently important for the Transactions, but could be published in the Proceedings. The author should not quote from textbooks, instead they should quote from the original paper. Suggests omitting some of the figures and reducing the length of some of the tracings. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 20 March 1907. 16 April 1907