Quain's monaural stethoscope
1841-1898
Quains monaural stethoscope, English, 1851-1898
1851-1898
Binaural stethoscope
Portable monaural stethoscope
1890
Portable monaural stethoscope
Portable monaural stethoscope, by Maw, English
Quain's monaural stethoscope
1841-1898
Chest piece from binaural stethoscope
1861-1920
