Referee's report by Frederick Gowland Hopkins, on a paper 'On intravascular coagulation in albinoes and pigmented animals, and on the behaviour of the nucleo-proteids of testes in solution in the production of intravascular coagulation' by George P Mudge Sectional Committee: Physiology Not recommended for publication in the 'Philosophical Transactions of the Royal Society'. The paper and conclusions are reminiscent of a 'preliminary communication'. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 29 May 1906. [May 1906]