Early binaural stethoscope
1861-1866
1861-1866
circa 1861
1862
1860
1865-1866
1865
1866
1865
1934
1863-1865
1860
circa 1860
2000-100 BCE
1893-4
1867
1863-7
1867-1868
1865
1864
circa 1868
1955; 1830
1867
1867
circa 1861
1869
1860
1862
1862
1990-96
1867
1860
1865
1930 (replica); 1834 (original)
1865-1866
1868
1869
circa 1860
1864
1801-1840 (original); 1901 (model)
circa 1860
1862
circa 1860
1860-1866
1705-1737
1862-1866
1870-1877
1860
1865
1865
1860