discovery.txt

# Column 1 is year (0 means "ancient")
# Column 2 is number of known elements
0 12
1669 13
1735 14
1737 15
1746 16
1751 17
1766 18
1772 19
1774 22
1778 23
1782 24
1783 25
1789 27
1790 28
1791 29
1794 30
1797 32
1801 33
1802 34
1803 37
1804 39
1807 41
1808 45
1811 46
1817 49
1823 50
1825 51
1826 52
1828 53
1830 54
1839 55
1843 57
1844 58
1860 59
1861 61
1863 62
1875 63
1878 65
1879 68
1880 69
1885 71
1886 74
1894 75
1895 76
1898 82
1899 83
1901 84
1907 85
1917 86
1923 87
1925 88
1937 89
1939 90
1940 93
1944 94
1945 96
1949 97
1950 98
1952 99
1953 100
1955 101
1961 102
1966 104
1968 105
1974 106
1981 107
1982 108
1984 109
1994 111
1996 112
1999 113
2002 115
2003 116
2004 117
2010 118