
Five wooden molecular model balls
circa 1810
circa 1810
1812
1812
1812
1814
1893-4
1863-7
2000-100 BCE
1813
1811-1812
1813-1814
1772 (original); 1919 (model)
circa 1810
1990-96
1775-1799 (original); 1900-1907 (model)
4000-2001 BCE
1813
1705-1737
1812
1814
1642-1649 (original); 1883 (model)
1990-95
1668; 1924
1610; 1923
1812
1976; 1776
1810-1812
1701-1800
1929 (copy); 1702-1714 (original)
300 BCE; 1905-1915
circa 1810
circa 1810
1889-02
1814
1774; 1923
1814
1883-01
1936
1730; 1967
1836-02
1872-08
1812
1813
circa 3000 BCE
1810
1812
1812
1814
1814
2000 BCE