Frist EKG (ECG) Machine
In this first EKG Machine, Right and Left hands and Left legs were immersed in jars of salt solution as electrodes !
Willem Einthoven (The Netherlands), used the string galvanometer to describe various deflections as features of a number of cardiovascular disorders. He was awarded the 1924 Nobel Prize for Physiology or Medicine for his discovery.
Note: This image is in the public domain because its copyright has expired in the United States and those countries with a copyright term of life of the author plus 100 years or less.
