
Five wooden molecular model balls
circa 1810
circa 1810
1812
1815
1815
1810-1817
1893-4
1812
1812
1814
1816
2000-100 BCE
1813
1815
1863-7
1772 (original); 1919 (model)
circa 1810
1814
1990-96
1815
1811-1812
1813
1705-1737
1815
1812
4000-2001 BCE
1775-1799 (original); 1900-1907 (model)
1813-1814
1814 - 1898
1807 - 1904
circa 1810
circa 1810
1889-02
1814
1774; 1923
1642-1649 (original); 1883 (model)
2000-100 BCE
1816
1818
1817
1814
1883-01
1817
1815
1815
30
1818
1-79 CE; before 1914
1991-1783 BCE
5000-500 BCE
1894-05