I 325 ) 



As the situation of tlie second point of intersection according to 

 the observations (7.95) shows a rather large discrepancy with that 

 given by tlieory (9.19), it is natural that only the sums of the 

 positive ditferences between the limits zero and tlie first ])oint of 

 intersection agree closely. 



Taken as a whole it may be stated that the secular variability of 

 barometric pressure at Helder is regulated by the law of accidental 

 events as completely as might have been expected considering the 

 scantiness of the material available. 



A possible skewness of the curve is left out of consideration as 

 has been already remarked; it can, however, be but unimportant as 

 in 720 deviations 364 are positive and 356 negative. 



The same cannot be ascertained of the secular variability of baro- 

 metric pressure at Batavia ; the difteronces between the observed 

 frequencies and those calculated according to the exponential law 

 are not of such a well marked description as for Helder, so that a 

 determination of the points of intersection is out of the question ; 

 their situation can onl}' be calculated as a result of theorj'. 



TABLE V. Barometer, Batavia. 



li, = 0.4895, n, = 0.31Ö6, it, = 0.2915. 



h (Exp. L.) = 1.2586, Jt (form. (2) = 1.040 X 3.142, 



^=1.989, A r= 0.796. 



Jt (form. 12)) = 1.0115 X 3.142. 



