20 



CONDENSATION OF VAPOR AS INDUCED BY NUCLEI AND IONS. 



Compared with the graph n and [dp]', table 7, where the upper limit 

 only is varied, the graph n and [dp^ lies in the main above it, in the 

 smaller exhaustions, and it should be remembered that the range of 

 variation is here smaller. But it does not lie as much above n and 

 [dp]' throughout as would be expected, seeing that only the upper points 



FIG. 6. Nucleation of dust-free air for different drops of pressure 8p = p p 2 ', [dp]' 

 denoting that the upper limits, [<J/>], that the lower limit of the drop of pressure 

 dp is varied. Also corresponding curve referred to the exhaustion dp/p. Three 

 series. Larger ranges of nucleation than in fig. 5. 



should coincide, intimating that there is some variation as compared 

 with fig. 6 not accounted for. This becomes specially evident when 

 the two graphs for [dp] in figs. 5 and 6 are compared, as shown in the 

 former. 



