n6 



CONDENSATION OF VAPOR AS INDUCED BY NUCLEI AND IONS. 



The results (fig. 36, e, /) for fog particles precipitated upon the vapor 

 nuclei of dust-free air are similar, but in no case does the coefficient of 

 survival x increase after the second exhaustion, as was the case with 



1-00 



20 



40 60 80 20 40 60 80 100 



37 



ZO 30 40 SO 40 60 80 100 



FIG. 37, o, b, c, d, e. The same as fig. 36, showing x, x', x", in terms of the diam- 

 eters d of fog particles evaporated. 



ions. (Compare fig. 36, c, d, with fig. 36, e, f, all of which apply for high 

 original nucleations of about io 6 per cubic centimeter.) Contrasting 

 the case of ions with the case for vapor nuclei, by comparing a with e 

 and c, d with /, in fig. 36, specifically, the coefficient of survival is always 



