
Five wooden molecular model balls
circa 1810
circa 1810
1812
1815
1815
1815
1810-1817
1893-4
1863-7
1812
1812
1814
1816
2000-100 BCE
1813
1772 (original); 1919 (model)
circa 1810
1814
1990-96
1775-1799 (original); 1900-1907 (model)
1815
1813
1705-1737
1815
1812
4000-2001 BCE
1811-1812
1813-1814
circa 1810
circa 1810
1889-02
1850-1899
1814
1774; 1923
1642-1649 (original); 1883 (model)
2000-100 BCE
1816
1817
1814
1883-01
1817
1815
1815
30
1-79 CE; before 1914
1991-1783 BCE
5000-500 BCE
1894-05
1816-1817
1867-04
1864-05