the Spectrum of Copper. 475 



-our present state of knowledge in further considering 

 them. 



If the doublet be regarded as the true Q(l) we find the 

 -following combinations : — 



?(l)-?(2) 



Calc. 



Obs. 



18295-68 



(4 n) 18298-11 



18602 



18609 



18481-70 



(3 n) 18484-20 



27050-8 



(2 n) 27052-98 



2310 



23043 



27281-8 



(In) 27283-41 



?(l)-<?(4) 



hut the last two have also been allocated to F 22 (8), F n (9). 



The observed appear displaced to the violet, which may be 

 a pole effect as these p{X)—J> (wi) combinations appear very 

 susceptible to the electric field. 



0,(4) is beyond Handke's region, but sounding with the 

 £ link gives the line shown and agrees within limits with 

 0, (4). So again there is no representative of Q, (9), but this 

 is probably due to the fact of its high order. The two lines 

 shown in the table are separated by 89 within limits of 

 that of Q(6) and are numerically at least displaced from 

 <X (9) as shown. 



Attention should also be drawn to the large number of 

 lines which are separated from these Q lines by amounts 

 which are equivalent to definite S displacements on the 

 limit. The & displacement on the limit shifts it by 12*723. 

 Thus there are lines whose separations from the Q are a 

 follows : — 



Q(9). 



- 77-47 



6 8 shifts 



76-33 



Q (8). 



127-29 

 63-58 



JOS „ 

 5S „ 



127-23 

 63-66 



Q(7). 



112-30 

 61-0 

 - 44-85 

 -1238 



8|5 „ 

 5£ „ 

 3H „ 

 ?** „ 



111-3 

 63-7 

 44-55 



124-02 



Q(6). 



56818, - 1936 

 - 64-70 



IP „ 

 »8 „ 



1910 

 63-66 





56996, 100-88 

 149-8 



8 8 ., 

 HI 8 „ 



101-7 

 1495 



Q(5). 



140 

 -116 



118 „ 

 9 8 „ 



139-92 

 114-5 



212 



