RESIDUAL WATER NUCLEI. 



number of ions is greater. Thus when n = 160,000, ix or 60 to 70 per 

 cent are lost during the first, and only about i x' or 20 percent during 

 the second and subsequent evaporations. If n = 900,000 to 1,100,000 

 where the fog particles are very much smaller, the first destroys about 



3 4- 1 Z 3 4 



/ & 3 4- 



FIG. 36, a, b, c, d e, f. Charts showing the rate of survival of nuclei in each successive 

 identical evaporation of fog particles precipitated upon ions, x is the relation of 

 the number of nuclei after the given evaporation of fog particles to the number of 

 nuclei before it. The abscissas show the number of evaporation in the series. 



80 per cent, the second 40 per cent, the third 30 per cent of the number 

 which happen to be present just before the respective evaporation. 

 Hence for large values of n the loss due to evaporation is appreciable 

 throughout many repetitions. 



