An improved method of encephalography.

Lumbar encephalography. In 1937 the authors published a monograph on the subject entitled The normal encephalogram. After Dyke's premature death in 1943 Davidoff collaborated with radiologist Bernard S. Epstein (1908-1978) on a follow-up monograph entitled The abnormal pneumoencephalogram (1950). Davidoff was the only Jewish resident that Harvey Cushing trained.