( 560 ) 



A]/.i = h{l-S K) 



C l/rr = 12 A' A' 



E y .t = — W K (9) 



Tlie po.silioii {>{' Ihe jioiiils dl' iiilcrscclioii ut' the nhscrved fVciiuciicy 

 (•iir\c witli llial oalculiited bv assiiiiiiiiu' liio simple expoiioiitial law 

 lo iiold <j;ood (the jxiiiils \\ iiere in Table II the iiiiinl)ers change iheir 

 sign) is determined liv Ihe e(niation : 



(.1 + Ca' + J-Jtt') y.-r — I, z=: U, 

 or: 



3 'A 



- (c" -\ = U, 



(10) 



0.525 1.(351 



(t, =z - - , a„ r= . 



/- ' Il 



In fact Table II shows that there are no more than two \vell 

 defined points of intersection, which jiistiiies the omission of higher 

 powers than the fourth in form. (4). 



Tabel VII shows the values of the constants of (4) and the values 

 of « calculated with the help of form. (9) and (10). 



It is ex'ident that, if form. (4) and the \alues of its constants 

 determined in the wav iudicated give a good re|)reseiitation of the 

 observed facts, the \alues of the coefHicient .1 must be nearly equal 



TABLE VII. 



Calculated. | Observed. 



