318 
Transactions of the Boyal Society of South Africa. 
whilst beyond C it is the third ring of electrons which stores up the energy 
of the incident radiation until the quantum hn^ has been received, when 
it explodes and shoots out the corpuscle. The L radiation of the element 
at C has the same frequency as the E radiation of that at B. 
Fourth, power of atomic number of absorbing element. > 
Fig. 1. 
Table III. 
Eadiation 
X.108. 
Atomic 
No. of 
radiator. 
\'-^Q=|;^xio3o 
Q 
Qi 
Transition from 
Q to Qi between 
-491 
47 
2815 
379-3 
7-42 
PtZ(46)-A^(47) 
Vd[B -508 
46 
3409 
452-0 
7-54 
Zn{SO) - Pc?(46) 
E/^/3-537 
45 
3855 
487-6 
7-91 
)J 5' 
Aga -554 
47 
4027 
532-5 
7-56 
Vda -576 
46 
4638 
615-5 
7-53 
55 55 
Bha -615 
45 
5194 
678-9 
7-65 
5 5 5 5 
Table III is obtained from the figures given in Bragg' s work, p. 179. 
The first column of values of Kw/]v;j^4 gives the average of these quantities 
