A.c. polarography is a dual time domain electrochemical technique being derived from a waveform containing both d.c. and a.c. components. During the history of the technique a considerable amount of research has been undertaken to alter and improve the a.c. aspects of the experiment but relatively little endeavour has been made to modify the equally important d.c. component. In the present work the use of a non-linear potential versus time ramp of the kind used in normal pulse polarography is considered as an alternative way of generating the d.c. component of the a.c. polarographic experiment and results are compared with the usual approach in which a linear d.c. potential versus time ramp is used. Results for several electrode processes are presented and differences introduced by using the pulsed d.c. waveform considered. Results clearly demonstrate that the range of a.c. polarographic methodology can be usefully extended by varying the nature of the d.c. component of the experiment.