SOLAR CHANGES OF TEMPERATURE. 179 



THE RAINFALL OF "WHOLE INDIA." 



The next .step was to Avork on a lonoer ])jise, and for this purpose 

 Eliot's whole India table of rainfall, 1875-ls<>6 (Nature, vol. Ivi, p. 

 110), embracing ])oth the southwest and northeast monsoons, being at 

 our disposal, was studied. 



It was anticipated that such a table, ])uiltupof means observed over 

 such a large area and during l)oth monsoons, would more or less con- 

 ceal the meaning of the separate pulses observed in separate localities; 

 this we found to l)e the case. * '^'' ^' 



The pulses in the period stand as follows: 



Percentage Heat 

 variation, pulse. 



Min. LS7S +15 — ^ Years after 



rise of 



, Max. 1 SSL' f 6 H Years after 



j rise of 

 — Min. l.ssy + G — 1 



iron 

 lines. 



unknown 

 I — Max. 1893 +22 -j ' lines. 



The variations in the intensities of the pulses of rain at the success- 

 ire maxima and minima are very remarkable and suggest the working 

 of a higher law, of which we have other evidence. But, putting this 

 aside for the present, it should be pointed out that even normallv we 

 should not expect the same values for the rainfalls in 1882 and 1893, 

 because the amount of spotted area was so different, 1,160 millionths 

 of the solar surface being covered with spots in 1883, and 1,130 in 1893. 



The ver}" considerable variation in the quantity of snowfall on the 

 Himalayas has often been pointed out by the Indian meteorolo- 

 gists. * *'■ * 



The Himalayan snowfall, beyond all question, follows the same law 

 as the rain, the values occurring at the + and — pulses, as under, 

 being among the highest: ' 



Inches. 



I 67-S ... 134 



— + 71-2 ... 110 



77-8 ... 207 



— 4 82-8 ... 81 



From these tables it follows that l)oth iii rainfall and snow the quan- 

 tity is increased in the years of the rise both of the unknown and iron 

 lines. * * * 



THE MAURITIUS RAINFALL. 



* * * With regard to the general rainfall of Mauritius through- 

 out the year, it may be stated that on the average the most rainy 

 months are from December to April, both months inclusive. 



1 Indian ^Meteorological Memoirs, Vol. Ill, p. 235. 



