A multiple channel electroencephalograph permits the simultaneous recording of several leads in electrocardiography. In order to utilize for this purpose the electroencephalograph installed in this hospital, a method has been worked out to record in groups of three the 3 standard leads, the 3 augmented unipolar limb leads, and 3 unipolar precordial leads consecutively, changing over from one group to the other simply by turning a switch. The technique here described is used in connection with a four-channel Marconi electroencephalograph.