ALTER: RAINFALL AND SUN-SPOT PERIODS. 



35 



TABLE 1— Wolfs A Wolfer's table of sunapot maxima and minima. 

 (Copied from Monthly Weather Review, .August, 1920.) 



Epocha. 



1610 8 

 1619 

 1B34 

 1645 

 1655 

 1666 

 1679.5 

 1689.5 

 1698 

 1712 

 1723 5 

 1734 

 1745 

 1755 2 

 1766 5 

 1775 5 

 1784.7 

 1798 3 

 1810.6 

 1823 3 

 1833 9 

 1843 5 

 1856.0 

 1867.2 

 1878.9 

 1889.6 

 1901.7 

 1913.4' 



Minima. 



Weights. 



1 

 3 

 2 



2 



2 



9 



5 



7 



4 



9 



8 



10 



10 



10 



10 



10 



10 



10 



10 



10 



Periods. 



8.2 

 15 

 11 



10 



11 

 13.5 

 10.0 



8.5 

 14 

 11.5 

 10.5 

 11.0 



10 2 



11 3 

 9.0 

 9.2 



13 6 

 12.3 

 12.7 

 10.6 

 9.6 

 12.5 

 11.2 

 11.7 



10 7 



12 1 



11 7 



Epochs. 



1615 5 



1626 



1639 5 



1649 



1660 



1675 



1685.0 



1693.0 



1705.5 



1718.2 



1727.5 



1738 7 



1750.3 



1761.5 



1769. 



1778 



1788. 



1805. 



1816. 



1829.9 



1837.2 



1848 1 



1860 1 



1870.6 



1883.9 



1894.1 



1906.4 



1917 6 



Maxima. 



Weights. 



2 

 5 

 2 

 1 



1 



2 



2 

 1 

 4 

 6 

 4 

 2 

 7 



5 



4 



5 



8 



10 



10 



10 



10 



10 



10 



10 



10 



10 



Periods. 



' See text. 



TABLE 2. 



Year. 



Period. 



Depar- 

 ture. 



Year. I Period. 



1871 

 72 

 73 

 74 

 75 

 76 

 77 



1880 

 81 

 82 

 83 

 84 

 85 

 86 

 87 



1890 

 91 



Months. 

 106 

 135 

 156 

 170 

 180 

 184 

 184 

 184 

 181 

 173 

 161 

 144 

 113 

 102 

 100 

 100 

 101 

 108 

 128 

 138 

 142 



Depar- 

 ture. 



—29 

 

 + 21 

 + 35 

 + 45 

 +49 

 + 49 

 + 49 

 +46 

 + 38 

 + 26 

 + 9 

 — 22 

 —33 

 —35 

 —35 

 —34 

 —27 

 — 7 

 + 3 

 + 7 



Year. 



Period. 



Months. 



Depar- 

 ture. 



