TABLE 664.-66 KNOWN ELEMENTS IN THE SUN'S ATMOSPHERE* 627 

 Part 1. — Approximate counts of atomic lines identified in solar and sunspot spectra 206 



Neutral atoms 



Disk 



No. lines 



Spot 



No. lines 



Singly ionized atoms 

 Disk 



No. li 



Be ii 2 1 



Mgn 12 2 (1000) 



Sin 4 2 2 



Rhn? 



-2 



Ban 6 3 8 



* Prepared by Charlotte E. Moore, National Bureau of Standards. 



200 The sources used are as follows: 



2935A— 3062A, Babcock, H. D., Moore, C. E., and Coffeen, M. F., Astrophys. Journ., vol. 107, p. 287, 1948 

 (Mount Wilson Contr. No. 745). 



3062A— 6600A. St. John, C. C, and others, Revised Rowland Table, Carnegie Inst. Washington Publ. 396, 

 1928, with unpublished corrections and revisions by C. E. Moore (September 1949). 



6600. \— 13495A, Babcock, H. D., and Moore, C. E., Carnegie Imst. Washington Publ. 579, 1947. 



The counts included also the rate ultime of Mg I (2852A); the ultimate lines of Mgn (2795A, 2802A) 

 and the strong Si i line at 2881 A. These lines, among others, have been identified in the ultraviolet solar spec- 

 trum photographed from a V-2 rocket. Intensities in parentheses are quoted from the paper on this subject by 

 Durand, E., Oberly. J. J., and Tousey, R., Astrophys. Journ., vol. 109, p. 1, 1949. (See also Hopfield, J. J., 

 and Clearman, H. E., Phys. Rev., vol. 73, p. 877, 1948.) 



For lines of H and He see Menzel, D. H., Lick Obs. Publ. 17, p. 1, 1931; Mitchell, S. A.. Astrophys. Journ., 

 vol. 105, p. 1, 1947. 



* # These counts refer to lines not present in disk spectrum. t Lines of H and He are prominent in the 



spectrum of the chromosphere. t B and F are identified only from their presence in compounds (see Part 2). 



(continued) 



SMITHSONIAN PHYSICAL TABLES 



