
Five wooden molecular model balls
circa 1810
circa 1810
2000-100 BCE
1815
1815
1813
1815
1812
1863-7
1893-4
1775-1799 (original); 1900-1907 (model)
1815
4000-2001 BCE
circa 1810
1814
1990-96
1705-1737
1811-1812
1772 (original); 1919 (model)
1813
1812
circa 1810
circa 1810
1889-02
1972-3
2500 BCE
2000-1000
1880-120
1813
1815
1860-1715
1872-3
1811
2000-100 BCE
2000-1001 BCE
1851-1800
1813
1810
1811
1990-95
1811-1813
1811
1814-1815
1813-1815
1812
1810
1810
1815
1810
1713-1750
1812