
Five wooden molecular model balls
circa 1810
circa 1810
1815-1825
2000-100 BCE
1815
1820
1825
1815
1826
1813
1815
1825
1812
1826
1810-1817
1863-7
1893-4
1775-1799 (original); 1900-1907 (model)
1815
1824
1821
1821
1823-1825
1826
4000-2001 BCE
circa 1810
1814
1990-96
1823-1825
1823
1824
1815-1825
1705-1737
1811-1812
circa 1821-1825
1821
1826
1826
1820
1821
1772 (original); 1919 (model)
1826
1819
1813
1822
1820
1812
circa 1810
circa 1810
1823
1889-02