Five wooden molecular model balls
circa 1810
circa 1810
1861
circa 1830
circa 1820
1845-1855
1855-1865
1855-1865
1845-1855
1905-1915
1865-1875
1870-1900
1835-1845
1900
1825
1870-1880
1895-1900
1890-1895
1880-1900
1830
1855-1860
1910-1915
1910-1920
circa 1856
1860
1895-1905
1875-1885
1910-1950
1855-1865
1912
1880-1900
1835
1850-1860
circa 1820
1900
1844
1845