On Homogeneous Rontgcn Radiatit 



447 



correction formula, thus the proper choice of experimental 

 conditions enables a simple formula to be developed, from 

 which the necessary corrections for after-effects can be 

 definitely determined. 



The testing of bifilar suspensions and the determination of 

 the necessary constants can be performed by a method which 

 is free from experimental difficulty. 



It is a pleasure to record great indebtedness to Prof. H- T. 

 Barnes for his many suggestions and kind interest in the work. 

 March 6, 1911. 



XLITI. The Transformation of the Energy of Homogeneous 

 Hontgen Radiation into Energy of Corpuscular Radiation. 

 By Charles A. Sadler, L.Sc, Oliver Lodge Fellow in the 

 University of Liverpool*. 



IN a recent paper f the author gave an account of an 

 investigation of the corpuscular radiation from metals 

 excited by beams of homogeneous Rontgen radiation. The 

 following is an account of some further deductions derived 

 from the results of these experiments. 



Kff. 1. 



to J. . eccrome ter 



For the sake of clearness a diagrammatic representation 

 of the apparatus then used is given in fig. 1. 



* Communicated by the Author. Part of the expenses connected with 

 this Research were defrayed bv a Government Grant, 

 t Sadler, Phil. Mag. March 1910. 



