'In 1852 George Cammann gave physicians a version of this instrument that they could listen to with both ears'
a stethoscope
19th CENTURY MEDICINE: In 1852 George Cammann gave physicians a version of this instrument that they could listen to with both ears
In 1852 George Cammann gave physicians a version of this instrument that they could listen to with both ears
In 1852 George Cammann gave physicians a version of this instrument that they could listen to with both ears
19th CENTURY MEDICINE
a stethoscope
19th CENTURY MEDICINE