Cammann type binaural stethoscope
1845-1855
1845-1855
1820
1829
1839 (original); circa 1988 (replica)
circa 1848
1850
1851
1848
1840
1990-96
1838
1934
1838
1851
1820-1850
1830
1828
2000-100 BCE
circa 1854
1840-1850
1934
4000-2001 BCE
1854
1825
1830-1850
1830
1850
1955; 1830
circa 1854
1851
1836
1840
1820-1840
circa 1840
1820-1830
1870-1877
circa 1850
1830
1823
1841
1850
1840s
1893-4
1821
1829
1840-1850
1837
1850
1821-1850
circa 1854