![](https://coimages.sciencemuseumgroup.org.uk/486/821/large_thumbnail_y1997_0006_0053__0006_.jpg)
Five wooden molecular model balls
circa 1810
circa 1810
1861
circa 1830
1855-1865
1855-1865
circa 1820
1890-1895
1825
1900
1870-1880
1845-1855
1870-1900
1880-1900
1835-1845
1905-1915
1895-1900
1830
1865-1875
1845-1855
1910-1915
1910-1920
1860
1895-1905
circa 1856
1855-1865
1910-1950
1912
1875-1885
1880-1900
1835
1850-1860
1855-1860
circa 1820
1900
1844
1845