
Early inhaler for ether anaesthesia
1847-1848
1847-1848
1801-1840 (original); 1901 (model)
1838
circa 1846
2000-100 BCE
1840
1842
1850
1837
1849
1841
1842
1845
1845
1850
1838
1845
1837
1842
1836
1837
1840-1845
1839
1955; 1830
1837
1850
circa 1840
1839
1843
1849
1840-1850
1846
1842
1848
1837
1837
1847
1840
1893-4
1846
1844
1934
1837
1844
1863-7
1850
1840
1849
1841
1838