( 440 ) 

 Zinc. 



For this element I liaxe oalculated the formulae of the 1^*^ and 

 2"*^ associated series for tlie components with the greatest wave- 

 length of the triplets. 



The limits are determined for the two series separately, for the 

 first associated series the calculation gave 42876,25 and for the 

 second associated series the limit appeared to be 42876,70. A very 

 good agreement. 



The formula gives as 1®' line of the i^^ associated series of Zinc the line 

 8024,05, which has not been observed. The 8''Mine of the first associated 

 series 2409,22 has not been observed either. As 9^^ ijp^^ Qf ji^jg ggrigg 

 2393,93 was calculated, which is in remarkably good harmony with 

 the intense line 2393,88. As yet this line had not yet been fitted 

 in the series. The great intensity of a curve in the root of the series 

 is certainly strange ; an investigation of the magnetic splitting might 

 decide whether it is correct to range this line under the first associated 

 series. 



The formula for the 1^^ associated series is : 



= 4-2876,25 



109675 



0,007085\' 



m + 0,909103 — 



in J 



and for the 2°** associated series 



n — 42876,70 - 



109675 



m + 1,286822 



0,058916 



FIRST ASSOCIATED SERIES. 



