Notes on papers passed for publication [Proceedings] Lists the committee's decision to publish papers. B Katz, 'The electrical properties of the muscle fibre membrane'. Communicated by A V Hill. H McIlwain, 'Metabolic changes which form the basis of a microbiological assay of nicotinic acid'. Communicated by H A Krebs. K C Richardson, 'Contractile tissues in the mammary gland with special reference to myoepithelium in the goat'. Communicated by J Z Young, FRS. A U Smith, 'Some antigenic properties of mammalian spermatoza'. Communicated by A D Parkes, FRS. G L Brown FRS, and B Delisle Burns, 'Fatigue and neuro-muscular block in mammalian skeletal structure'. A V Hill FRS, 'The heat of activation and the heat of shortening in a muscle twitch'. A V Hill FRS, 'The energetifs of relaxation in a muscle twitch'. A V Hill FRS, 'Work and heat in a muscle twitch'. F W R Brambell, W A Hemmings, M Henderson, H J Perry and W T Rowlands, 'The route of antibodies passing from the internal to the foetal circulation in rabbits'. H E Davenport, 'The haemoglobins of Ascaris lumbricoids'. Communicated by R Hill, FRS. H E Davenport, 'The haemoglobins of Nippostrongylus nuris and Strongylus spp.' H E Davenport, 'Ascaris haemoglobin as an indicator of the oxygen produced by isolated chloroplasts'. Communicated by R Hill FRS. p14. 1949