CONDENSATION OF VAl'OK AS INIH'CKP UY NUCLEI AND IONS. 



There is a curious consistency in the constants so determined, even 

 when the compensating values of b and c are of different signs, as, for in- 

 stance, in scries I. The reason is not apparent, but the fact is note- 

 worthy. These constants will necessarily be correct at three values of /, 

 but the computed values of ;; are no better as a whole than will be the 

 case if the first set of constants of series IT, for instance, are used. 



200 . 



WO 



J<> 



CO 



70 



i/ 10 ;a> 30 40 vi' ui- ;v 



FIG. 48. Decay of ionization in fog chamber in lapse of seconds, 



observed and computed. 



In fact, the constant b may be arbitrarily put as a reasonable estimate* 

 o.oooooi with (7 = 0.0356 and a fair reproduction of the observations 



*To\vnsend, McClung and Langevin find b= i.i X io~ 9 about, using electrical methods. 

 See Rutherford's Radioactivity, pp. 41, 42, 1905. 



