Notes on papers passed for publication in the Proceedings L Lawn and R A McCance, FRS, 'Ventures with an artificial placenta: principles and preliminary results'. Elsie M Widdowson and G C Kennedy, 'Rate of growth, mature weight and life span'. H Harris and J W Watts, 'The relationship between nuclear and cytoplasmic ribonucleic acid'. A C R Dean, 'Nucleic acid and protein content of Bact. lactis aerogenes: equilibrium and non-equilibrium conditions'. A C R Dean, 'Nucleic acid and protein content of Bact. lactis aerogenes: variation during conditions of nutrient deficiency'. A C R Dean, 'Nucleic acid and protein content of Bact. lactis aerogenes: effect of certain drugs'. M A Jennings, V T Marchesi and Sir Howard Florey, 'the transport of particles across the walls of small blood vessels'. p46. 1961