1873.] between Rainfall and Sun-spot Periodicity. 305 

 Table XII. (Maxirnuin-year, 1860). 



Stations. 



1858. 



1859. 



i860. 



1861. 



1862. 



1S63. 





■ 



in. 



in. 



in. 



in. . 



in. 



in. 





20'42 



20-78 



26-71 



25-39 



25*12 



21-79 





28*29 



30-65 



34' 6 5 



3°'97 



30'77 



25*74 





24*40 



25-20 



30*30 



29'5o 



3 1'20 



24*70 





40*40 



43-85 



37-30 



45-o5 



51*55 



44*55 





23*20 



24-70 



27-30 



25-90 



29-80 



23-00 





23*58 



25'34 



3 I# 97 



28-51 



32-89 



29-10 





17-80 



25-90 



32*00 



20-40 



26-50 



19-80 





35-5I 



56-87 



45-i6 



6873 



28-40 



33-42 





24-10 



36-70 



29*10 



25-40 



32-01 



25*60 





237-70 



290*04 



294*49 



299-85 



288-24 



247*90 





26-41 



32-23 



32*72 



33-32 



32-03 



27-54 



Combining the means in Tables X., XI., and XII., we get : — 



Table XIII. 



Years. 



Eainfall. 



Means. 





in. 



in. 





92*15 



3072 



1835, 1847, i860 



90-88 



30-29 



1836, 1848, 1861 



107-50 



35^3 





96-60 



32*20 



1838, 1850, 1863 



92*36 



3°79. 



The last four Tables show an increase of rain at or very near the 

 maximum-sunspot year ; and there is, upon the whole, a distinct ten- 

 dency to an ascent and descent. 



Comparing Tables IX. and XIII., we find that the mean rainfall in the 

 minim um-sunspot years 1834, 1844, 1856, and 1866 was 27*38 inches, 

 and in the maximum-sunspot years 1836, 1848, and 1861, 35*83 inches, 

 giving an excess of 8*45 inches. 



"With the exception of 1842, all the years of minimum and maximum 

 rainfall shown by the Tables are within a fraction of the corresponding 

 minmum- and maximum-sunspot year. 



The last Table I beg to present is one showing the annual fall at eighteen 

 stations. An inspection of it will show that, generally, 3 the maxima- 

 periods of those years give each more rainfall than any other three con- 

 secutive years, and the minima-periods less rain than any other three 

 consecutive years, in each set of observations. 



There are no doubt errors of observation, as well as discrepancies, 

 arising from changing the forms and positions of the gauges ; and it is 

 difficult to believe that more correct observations would not have given 

 still more remarkable results. 



