Contributions of the vacuum tube to early electrophysiological research.
Geddes
L A
LA
Department of Biomedical Engineering, Purdue University, 1296 Potter Building, West Lafayette, IN 47907-1296, USA.
D004562:Electrocardiography / Q000266:history* / Q000295:instrumentation; D004569:Electroencephalography / Q000266:history* / Q000295:instrumentation; D004867:Equipment Design; D049672:History, 19th Century; D049673:History, 20th Century; D014618:Vacuum