Annual data retrieved from the observations made by D.E. Hadden First column: year Second column: number of days observed Third column: average number of groups Fourth column: average number of spots Fifth column: average number of faculae Original reference: V.M.S. Carrasco, J.M. Vaquero, M.C. Gallego, R.M. Trigo (2013): "Forty two years counting spots: solar observations by D.E. Hadden during 1890-1931 revisited". New Astronomy 25, 95-102. YEAR N G S F 1891 257 2.9 14.9 3.6 1892 205 5.6 34.8 4.1 1893 177 6.6 36.6 4.0 1894 129 5.6 27.5 3.4 1895 149 5.2 30.5 3.5 1896 197 3.3 17.8 2.9 1897 198 2.4 11.9 2.4 1898 234 2.1 11.0 2.4 1899 259 1.1 4.8 1.5 1900 255 0.7 3.4 1.0 1901 269 0.3 0.9 0.3 1902 230 0.4 2.0 0.5 1903 230 1.7 7.9 1.9 1904 172 3.1 13.3 3.1 1905 202 4.4 18.2 3.9 1906 198 3.8 15.0 3.3 1907 205 3.8 15.8 3.4 1908 231 3.4 13.0 3.4 1909 121 3.0 12.8 3.0 1910 171 1.3 5.0 1.9 1911 156 0.6 1.6 1.0 1912 150 0.4 1.8 0.7 1913 159 0.1 0.6 0.3 1914 - 1.0 3.5 1.4 1915 - 3.0 16.4 3.7 1916 - 4.5 21.7 3.9 1917 - 7.3 - - 1918 - 5.7 - - 1919 - 4.5 - - 1920 - 2.4 - - 1921 161 1.8 8.4 2.3 1922 161 1.1 5.0 1.2 1923 173 0.6 2.4 0.9 1924 172 1.2 7.1 1.6 1925 115 3.1 17.3 3.1 1926 100 4.4 20.7 4.1 1927 75 4.7 25.6 4.1 1928 109 5.4 28.7 3.8 1929 49 4.7 22.9 3.8 1930 115 2.7 - - 1931 139 1.6 - -