Papers passed for publication [Proceedings] Lists papers passed by the Physiology Committee: J Ferguson, 'The use of chemical potentials as indices of toxicity'. Communicated by A J Clark, FRS. D Keilin, FRS, and E F Hartree, 'Cytochrome and cytochrome oxidase'. L R Phillips, 'Some factors producing individual differences in dark adaptation'. Communicated by C L Evans, FRS. A HAddow and A M Robsinson, 'The association of carcinogenicity and growth-inhibitory power in the polycyclic hydrocarbons and other substances'. Communicated by E L Kennaway, FRS. p159. March 1939