Early binaural stethoscope
1861-1866
1861-1866
circa 1861
1862
1860
1858
1858-03-02
1865-1866
1858
1858
1857-1858
1865
1857-1858
1857-1858
1866
1865
1934
1863-1865
1860
circa 1860
2000-100 BCE
1893-4
1867
1858
1863-7
1865
1864
1955; 1830
1867
1867
1859
circa 1861
1857
1860
1862
1862
1990-96
1867
1860
1865
1930 (replica); 1834 (original)
1858
1865-1866
1868
after 1859
1934
1888
1839 (original); circa 1988 (replica)
1775-1799 (original); 1900-1907 (model)
1857
1862