428 



DR. W. M. HICKS: A CRITICAL STUDY OF SPECTRAL SERIES. 



No. (2) is close to (-2^) 25107 or (SJ F,. It should be noted that the C.R. copper 

 line is a (-SJ displacement on that observed by WATSON, and that the latter was 

 only observed after the emanation had been standing two days. No. 3 gives the 



calculated values. 



m = 5. 



Outside 



L 1(1) 26669-23 5648'6 + du 

 26669-23 5652 -8 + dv 



(1)21 126 -0(W.). 



32317-8 2822 + 6p 



(2) 18641-4(W.). 



32322-0 2817-4 



23948 (C.R.).u 

 35139 + 6^ 



(6)21458-86(W.).t>, (6'56) (R.R.) 

 35139-46 



.(!) 19842-4 (W.).e u.(4) 22636 (C.R.).e 



26669-23 5659'7 + de-du 32328-9 2793 -6 + 6p 35122-5 



These would seem to show in Nos. 2, 3 sequence displacements ; 28 would here 

 produce a change of 4. In (2) it is displaced in the second and continued in the 

 third. In (3) it is displaced only in the second. 21126 acts as a sounded line for 

 F 3 (4) and F.,(5). Both cannot be real or the line is double. 



L 1(2) 27566-,' 



2 ( 



' I 27566-.' 



m = 6. 



(1) 22015 (C.R.).w 

 36 5640 4 + 6p + du 33206 8 + 6p 



36 5642 + dv 



(3) 19527-8 (W.).v 

 33208-4 



There is a C.R copper line (2) 16386 3 which with the u link gives 27577 3 and 

 may be (-5,) F(6). 



The two last observed lines have been included in order to show that sounding is 

 justified by them. The calculated line for m = 7 is 281557, with error probably 

 within 3 or 4 units. There is 16982 (C.R) which with u sounder gives 28173'83 

 and may well correspond to (<$,) 1 (7). Also 22636 (C.R.).w gives 33827'8 which is 

 5654 ahead and may be (c^) F g (7). But this line with an e u link also gives F 3 (6). 

 It should be noticed how the lines observed by CAMERON and KAMSAY with copper 

 electrodes come in to fill parallel and displaced lines where they seem called for. 



The corresponding F lines for the orders above the observed ones are in the ultra- 

 violet, but evidence for their existence is given by sounding. In what follows, the 

 value of F, calculated from F, is enclosed in square brackets. 



f (J,) (6) 21712-09 (R).2 

 ' I 440817 



5649-6 



[44082'42.] 



27389-61 (R).2w 

 49731'c 



(3) 16725-1 (W.).2w 

 44086-3 + 2dv 



8445 = 5645 + 2814-13-96 



(8) 25170-10 (W.).2v ? 

 52531- 



