The American physician George P. Cammann invented the binaural flexible stethoscope. By 1852 Cammann "had developed a stethoscope with flexible tubing (spirals of wire covered with silk, later rubber, or as he called …
The American physician George P. Cammann invented the binaural flexible stethoscope. By 1852 Cammann "had developed a stethoscope with flexible tubing (spirals of wire covered with silk, later rubber, or as he called …
