86 CONDENSATION OF VAPOR AS INDUCED BY NUCLEI AND IONS. 



TABLE 37 Continued. 



many nuclei than when placed at b and over twice as many than when 

 placed at a, and the rate of production of ions would be as the square of 

 these numbers. The effect is enhanced by the fact that the lateral rays 

 have to pass obliquely through the glass; but this appears to be a minor 

 disturbance. In all the experiments an aluminum gutter was cemented 

 to the top of the fog chamber and the sample tubes of radium placed 

 between given marks within it. 



300 



00 



too 



27 



o 



100 ZOO 



300 400 



FIG. 27. Aggregated effect of beta and gamma rays of different samples of radium, 

 I, II, III, IV, and V, observed and computed in terms of nucleation n produced. 



Table 37 contains the values of 2w 2 for the four series of experiments 

 given, and in fig. 27 these data are additionally shown by mapping out 

 the observed n as abscissas and the computed w = 



2 as ordinates. 

 There is considerable divergence from the straight line which ought to 



