III. - The antagonism between the on and off systems in the cat's retina

Single spikes, isolated from the retina of decerebrate cats by the micro-electrode technique, have been studied at variable short exposures of illumination in order to find out whether on-and off-discharges overlap and mutually reinforce each other, or whether they are mutually exclusive in the sense that the final common path only can deliver one at a time. The latter was found to be the case.