1902.] A Short Period of Solar and Meteorological Changes. 503 



pressure changes be subsequently confirmed, some of them not constant 

 in all localities will have to be explained; and it is possible we 

 may obtain in this way some new knowledge on the atmospheric 

 circulation. 



1860 



I I I 



1870-0 



ii!>. 



1880-0 



1890-0 1900-0 



i i I i i i i i i i i i I i i 



PRESSURE 



( YEARLY MEAN) 630 " 



BOMBAY 610 " 



29-730 - 



RAINFALL 74 ~ 



(YEARLY MEAN) 58 " 



MADRAS 



RAINFALL 



(SEPT. — D EC.) 



12 STATIONS 

 IN 



CEYLON 



RAINFALL 



(MAY -OCT.) 



MALABAR 

 W. GHATS 



£6- 

 56- 

 48- 

 40- 

 32- 

 24- 

 140- 

 120- 

 100- 

 80- 



PRESSURE29-7000 - 

 (APR- SEPT.) 200- 



BOMBAY 400- 



SCALE INVERTED) 600- 



7-00- 

 6O0- 



CORDOBA 725.0Q. 



PRESSURE 



(APR. -SEPT.) 



1860-0 





1 J 







\ - r 



i 



i 







H 



V" v 



J ^ 

 C 



y 











D 









A a! / 



v A 



E 









A/y 





F 















* • i 



1 1 1 1 1 1 1 1 



. | I . 1 ! 





1 t 1 1 1 1 1 1 1 1 1 1 1 



1870-0 



1880-0 

 Fig. 2. 



1890-0 



!900-0 



10. The period of time included in this survey begins generally with 

 the establishment of the full records of the Indian Meteorological 

 Department in 1875 and extends to 1895, when the regularity of the 

 widened-line phenomena was broken, as stated in a previous com- 

 munication. 



Addendum. Dated June 26. 



In continuing the above researches we have plotted the percentage 

 frequency of the solar prominences derived from the Italian observa- 

 tions for each 10° of solar latitude N. and S. of the Equator. 



vol. lxx. 2 M 



