Notes on papers passed for publication in the Proceedings J A V Butler, FRS, R H Pain, A B Robins, and J Rotblat, 'the relative effects of direct and indirect actions of ionizing radiations on deoxyribonucleic acid'. D A T Dick, 'Osmotic equilibria in fibroblasts in tissue culture measured by immersion refractometry'. R G Edwards, 'The experimental induction of gynogenesis in the mouse; treatment of sperm by trypaflavine, toluidine blue or nitrogen mustard'. A V Hill, FRS, 'The relation between force developed and energy liberated in an isometric switch'. D R Bangham, P L Ingram, J H B Roy, K W G Shillam and R J Terry, 'The absorption of 131I-labelled serum and colostral proteins from the gut of the young calf'. p9. 1958