Papers passed for publication in the Proceedings Sir Percival Hartley, FRS, 'The effect of peptic digestion on the properties of diptheria antitoxin'. L G Brock, J C Eccles, FRS, and W Rall 'Experimental investigations on the afferent fibres in muscle nerves'. J C Eccles, FRS and W Rall, 'Repetitive monosynaptic activation of motoneurones'. H M Bruce and G C Kennedy. 'The central nervous control of food and water intake'. Communicated by A S Parkes, FRS M Abercrombie and R D Harkness, 'The growth of cell populations and the properties in tissue culture of regenerating liver of the rat'. Communicated by J Z Young, FRS. W S Bullough and M Johnson, 'The energy relations of mitotic activity in adult mouse epidermis'. V S V Fernand and J Z Young, FRS, 'The sizes of the nerve fibres of muscle nerves'. B C Abbott, X M Aubert and A V Hill, FRS, 'The absorption of work by a muscle stretched during a single twitch or a short tetanus'. B C Abbott and X M Aubert, 'Changes of energy in a muscle during very slow stretches'. E C Amoroso, F R Bell, and H Rosenberg, 'The localisation of respiratory regions in the rhombencephalen of the sheep'. Communicated by C A Lovatt Evans, FRS. p24. May - June 1951