Letter from Alan Lloyd Hodgkin, on a paper 'Fatigue and adaptation of the cupular mechanism of the human horizontal semicircular canal: an experimental investigation' by Charles Skinner Hallpike and J D Hood, to D C Martin, assistant secretary of the Royal Society Paper reference code: B.5 Believes the paper should be published, though the authors could be asked to revise the manuscript first. Also suggests some additional referees. [Published in Proceedings B, 1953]. Received 12 February 1953 9 February 1953