1876.] 



Variations of the Barometer in India. 



33 



The minimum preceding this maximum occurred on the Sunday : the 

 barometric fall after the maximum is considerably greater at Simla than 

 at the other stations ; the epoch of maximum is thus accelerated at 

 Simla, where the curve has a much sharper form than at the other 

 stations. The minimum after this maximum again occurs on Sunday*. 



14. March 19^. Tig. 14, p. 37. 



d h 



Highest mean, Simla, March 19 9 



„ „ Madras „ 19 3 



„ ,, Singapore „ 19 18 



A great diminution of pressure begins immediately after this maximum 

 at all the three stations, forming the most rapid barometric fall within five 

 days throughout the three months. The exact hour of minimum cannot 

 be given certainly for want of observations on Sunday ; but from a com- 

 parison of the means for Saturday (March 22^, curves, p. 28) with the daily 

 means for each hour, p. 37, the following are probably within a few 

 hours of the true times. 



15. March 23^ 24^ Eig. 15, p. 37. 



d h 



Lowest mean, Simla, March 24 ? 



„ Madras „ 23 22? 



„ „ Singapore „ 24 4 ? 



16. March 28^ Tig. 16, p. 37. 



d h 



Highest mean, Simla, March 28 4 

 „ „ Madras „ 28 5 



„ „ Singapore „ 28 20 



As another maximum occurred at Simla after 29*^ 0^ (Sunday), it is 

 not certain which of the two should be compared with the maximum at 

 the other stations. The minimum which follows this maximum occurs 

 on Sunday. 



17. March 31^. Eig. 17, p. 37. 



d h 



Highest mean, Simla, March 31 23 

 „ Madras „ 30 18? 

 ,, ,, Singapore „ 31 8 



This is a very small movement which has been felt earliest at Madras ; 

 it has nearly the same character at Simla and Singapore : the time for 

 Madras is estimated from the Saturday mean (see curves, p. 28, March 

 29^), and from the figure 17, p. 37. 



* It may be pointed out that in the space of 66 days after the principal maximum 

 (January 12'' to March 19"^), ten (chiefly secondary) maxima succeed each other at 

 nearly equal intervals of 6^ days. 



VOL. XXV. B 



