( Sirs ) 



R//X , co/IX 



wllY 



a>,/Z 

 R//Y , co// 7 



»//r 



CU//Z 



/2//Z , to/'/X 



co//r 



Ü>//Z 



The theory 1 have developed l ) makes the laws of the phenomena 

 under consideration depend on 4X 3 parameters ph, Ph> gh,fi>- 



ph and pf l (h = l, 2, 3) are determined by the quasi elastic and 

 damping forces acting on the electron in the crystal, when no mag- 

 netic field is excited. gk(h = l,2, 3) measure the direct action of 

 the magnetic tield on the electron parallel to the axes A', V, Z\ 

 f h (A = 1, 2, 3) determine certain couplings experienced by the 

 electron parallel to these axes. 



If we put 



N i =PiPx -./?»% N^^PiPi—yx 1 ^, 



N * =P,P,— f% »*■ N z^ = Pa Pi — .'/s' »"i 

 ^8 = P» P 3 — A* *>*> - V 13 = Pi /> 2 — „V »>*i 



where as before v represents the frequency, generally the magnetic 

 effect on an absorption line in the above mentioned cases is given 

 by the following functions : 



] ) W. Voigt. Gott. Nachr. 28 Juli 1906; Magnetro- unci Electrooptik. Leipzig 

 1908, p. 235 u. f. 



