Coster. 



Phil. Mag. Ser. 6, Vol. 43. PL XXIII 



Fig. 1 



PbL/3 (rocksalt crystal). 

 Fig. 3. 



Fig. 2. 



Rh L-spectrum 

 (gypsum crystal), 



RbLa t and L/3i with their 

 satellites (gypsum crystal). 



Fig. 4. 



Aluminium No 



7fj Aluminiurr 



Wave- length 







/Lot, W 4X/473,48X\) 







ZsLcL 2 W 4X1484,52 







,My W 1X6090 

 :>Kabs.Ca 2x3063,3 

 A^Ko6 ; Cu 4X1537,30 

 \Kct 2 Cu 4X1541, 16 

 \l/3 2 W 5X1241, St 



_i. 





^L/3, W 5X1279,17 



—\-y, W {1)6X1095,53 



M/3 W / X S750, 



W L and ^\I spectrum (gypsum crystal). 



