114 CONDENSATION OF VAPOR AS INDUCED BY NUCLEI AND IONS. 



TABLE 48 Continued. Summary of table 47. Vapor nuclei. 



Finally, the best method of interpreting the above results is in terms 

 of an equation of the form (if n 1 be the initial nucleation) 



n z = 



x' x" 



n 



where n z is the nucleation of the 2th exhaustion, y the exhaustion ratio, 

 II the subsidence correction, and x, x', x", etc., the successive coefficients 

 showing the relative survival x, or the corresponding loss i x, of nuclei, 

 accompanying the evaporation of fog particles. This equation asserts 

 that the loss is different in the successive evaporations, and this is 

 actually the case, as has been fully shown in table 48. The data x, x', 

 x", etc., have been constructed in fig. 36, a, b, c, d, in terms of the number 

 of successive identical exhaustions for the case where the nuclei are ions, 

 and in fig. 36, e, f, for the case of vapor nuclei. The ordinates thus show 

 the fraction of the total number of fog particles evaporated, surviving as 

 nuclei after the particular evaporation given (in turn) by the abscissas. 

 It is not probable that more than three or four successive data will be 

 trustworthy, because with the rapidly decreasing size of coronas the 

 errors are cumulative. 



Fig. 36, a, b, c, d, shows that the effect of the first evaporation is 

 always preponderating and that it is more destructive as the original 



