Early binaural stethoscope
1861-1866
1861-1866
circa 1861
1862
1870
1865-1866
1865
1866
1865
1871
1934
1863-1865
circa 1871
2000-100 BCE
1893-4
1867
1863-7
1867-1868
1865
1866-1870
1872
1864
circa 1868
1872 (original); 1909 (model)
1955; 1830
1870s
1867
1867
1872
circa 1861
1869
1862
1862
1990-96
1872
1867
1865
1930 (replica); 1834 (original)
1873
1865-1866
1868
1872
1870
1873
1869
1864
1871
1801-1840 (original); 1901 (model)
1872
1862
1705-1737