Early binaural stethoscope
1861-1866
1861-1866
circa 1861
1862
1865
1870
circa 1868
1865-1866
1863-1865
circa 1861
1869
1865
1866
1865
1867-1868
1866-1870
1955; 1830
2000-100 BCE
1893-4
1934
1867
1863-7
1864
1870s
1862
1862
1867
1867
1870
1990-96
1870
1867
1865
1930 (replica); 1834 (original)
1870
1869
1862
1705-1737
1865-1866
1865
1870
1868
1772 (original); 1919 (model)
1866-1870
1830 (original); 1967 (model)
1862-1866
1870-1877
1934
1888
1865
4000-2001 BCE