Notes on papers passed for publication in the Proceedings R Lemberg, FRS, 'Cytochrome oxidase and its derivatives: the action of strong alkalai on cytochrome oxidase'. R Lemberg, FRS, and T B G Pilger, 'Cytochrome oxidase and its derivatives: spectrophotometric observations on the modifications of cytochrome oxidase by alkali and urea'. A W Hill FRS, P Scott and K G Williams, 'The pattern of external respiration in the unanaesthetized animal'. R Lemberg FRS, T B G Pilger, N Newton and L Clarke, 'Cytochrome oxidase and its derivatives: carbon monoxide and cyanide compounds'. Lord Rothschild, FRS, 'Anaerobic fructolysis, lactic acid and heat production of bull spermatozoa'. A V Hill FRS, 'The efficiency of mechanical power development during muscular shortening and its relation to load'. B F Folkes and A P Sims, 'A kinetic study of the assimilation of 15 N-ammonia and the synthesis of amino acids in an exponentially growing culture of Candida utilis'. J N Thompson, J McC Howell and G A J Pitt, 'Vitamin A and reproduction in rats'. A Loveless, 'The influence of radiomemetic substances on deoxyribonucleic acid synthesis and function studied in Escherichia coli/phage systems. p67. June - July 1963