+-----------------------------------------------+ | Year. | Groups. | Days showing | Days of | | | | no spots. | Observation. | |-------|---------|--------------|--------------| | 1826 | 118 | 22 | 277 | | 1827 | 161 | 2 | 273 | | 1828 | 225 | 0 | 282 | | 1829 | 199 | 0 | 244 | | 1830 | 190 | 1 | 217 | | 1831 | 149 | 3 | 239 | | 1832 | 84 | 49 | 270 | | 1833 | 33 | 139 | 267 | | 1834 | 51 | 120 | 273 | | 1835 | 173 | 18 | 244 | | 1836 | 272 | 0 | 200 | | 1837 | 333 | 0 | 168 | | 1838 | 282 | 0 | 202 | | 1839 | 162 | 0 | 205 | | 1840 | 152 | 3 | 263 | | 1841 | 102 | 15 | 283 | | 1842 | 68 | 64 | 307 | | 1843 | 34 | 149 | 312 | | 1844 | 52 | 111 | 321 | | 1845 | 114 | 29 | 332 | | 1846 | 157 | 1 | 314 | | 1847 | 257 | 0 | 276 | | 1848 | 330 | 0 | 278 | | 1849 | 238 | 0 | 285 | | 1850 | 186 | 2 | 308 | +-----------------------------------------------+ "I observed large spots, visible to the naked eye, in almost all the years not characterized by the minimum; the largest appeared in 1828, 1829, 1831, 1836, 1837, 1838, 1839, 1847, 1848. I regard all spots, whose diameter exceeds 50", as large, and it is only when of such a size that they begin to be visible to even the keenest unaided sight.