Papers passed for publication in the Proceedings A A Eddy, T N C Carroll, C J Danby, and Sir Cyril Hinshelwood, For Sec RS, 'Alkali metal ions in the metabolism of Bact lactis aerogenes: I. Experiments on the uptake of radioactive potassium, rubidium and phosphorus'. A A Eddy and Sir Cyril Hinshelwood, For Sec RS, 'Alkali metal ions in the metabolism of Bact lactis aerogenes: II. Connection with viability, growth rate and enzyme activity'. A A Eddy and Sir Cyril Hinshelwood, For Sec RS, 'Alkali metal ions in the metabolism of Bact lactis aerogenes: III. General discussion of their role and mode of action'. A V Hill, FRS - 'The effect of series compliance on the tension developed in a muscle twitch'. A V Hill, FRS - 'The transition from rest to full activity in muscle: the velocity of shortening'. A V Hill, FRS - 'The earliest manifestation of the mechanical response of striated muscle'. A V Hill, FRS - 'The influence of temperature on the tension developed in an isometric twitch'. H Gruneberg, 'The genetics of a tooth defect in the mouse'. C G Butler, 'The importance of perfume in the discovery of food by the worker bee'. p24. March - April 1950