In what year was the spitball banned?
1920
1908
1908
1876
1890
1908
1876
1890
1908
1907
1876
1890
1908
1907
1876
1890
1888
1870
1875
1871
1908
1873
1907
1876
1892
1890
1888
1870
1887
1875
1871
1908
1873
1907
1876
1890
1892
1888
1870
1887
1875
1871
1908
1907
1876
1873
1886
1884
1894
1890
1896
1892
1908
1907
1876
1888
1870
1887
1875
1871
1873
1890
1908
1907
1886
1884
1894
1876
1893
1896
1898
1890
1892
1888
1870
1887
1875
1871
1908
1907
1876
1903
1873
1872
1886
1884
1885
1890
1908
1920
1907
1894
1876
1869
1893
1896
1902
1898
1890
1920
1892
1888
1870
1887
1868
1875
1909
1908
1876
1871
1895
1920
1903
1891
1873
1907
1886
1890
1908
1872
1884
1889
1885
1894
1876
1869
1913
1920
1906
1900
1890
1882
1893
1896
1902
1867
1898
1892
1908
1920
1906
1876
1900
1888
1870
1887
1868
1875
1909
1878
1871
1919
1920
1968
1906
1905
1895
1900
1874
1908
1865
1863
1903
1891
1873
1864
1919
1920
1968
1906
1907
1872
1886
1884
1889
1970
1883
1885
1894
1890
1900
1967
1901
1908
1976
1919
1876
1869
1913
1882
1893
1912
1920
1896
1902
1968
1867
1906
1970
1900
1967