20 Journal of the Mitchell Society [Augiist 



The following table gives the preliminary results thus far discov- 

 ered. The quantities bracketed are still doubtful. Those preceded 

 by an (a) are not found by the usual breaks in the curves but are 

 positions on the continuous curves where the ratio of the number of 

 secondary (s) electrons per primary (p) were such as indicated in 

 the s/p column. At present it appears as if the convergence wave- 

 length (s/pc=3) for tungsten ended at 91.2 A and is followed by an 

 absorption band extending probably down to 14 A. This is then fol- 

 lowed by the M cc line here extrapolated from the above measurements. 



TUNGSTEN 



3.3 3763 



8.5 '1450 Millikan's iron spectrum 



shoAvs 1430 and 1409 

 10.4 1184.6 also 1184 



24.3 507.0 also 506 and 552.1 



Intensity 7 

 Moc computed from San- 

 ford 's formula gave 

 484 A 

 45.8 269 Iron shows spectrum 



271.6 A 



( ) a( ) Doubtful 



200 a 61.6 



