1)11. W. M. HICKS: A riMTlCAL STUDY OF SPECTKAL SKIMKS. 



a 1 1 



TABU II. 



Na. 



A = 743. $= 19'I7. 



K. 



A = 2939. S = 55-45. 



* S. gives v = 61-25; L.D. give 59-15; both give 

 D 2 (8) the same. If we take this as correct and make 

 v - 57-87, the denominator = 8-733756. L.D.'s value 

 =. 8-729879. 



Na. NaP(oo ) ia given in [I.] = 41446- 76 1 '69, but WOOD'S measurements of the high orders require 

 a value alxnit 1-48 larger, say, close to 41448-24. Also FABKY and BUISSON'S interferometer measure of 

 NaP(l) give, when referred to HAKTMANN'S It scale, n = 16972-85. Whence 



VP(1) = 41448-24-16972-85 = 24475-39 



and this should be !>(-/.) and S(<x). Further, S(<) is given in [I.] as 24472' 11 3-84 and 

 XICKKNOKAIIT'S measures of high order require alwut 3 or 4 more, or, say, 3'5, which is within allowable 

 limits. This would give S(oo) = D(oo) = 24475-61. Thirdly, D(oo), calculated from m = 3, 4, 5, 

 gives 24475-20. ZICKK.M>I:AHT'S measures, however, if exact, require about 2 larger. The three 

 combined appear to point to a value close to 24475*40, and this was taken for calculation. In the 

 modified table above, it was found Ixjtter to take D( oo) about 1 larger, in the direction of ZICKKNURAHT'S 

 results, and the table is therefore based on 24476-40. For Nal)(6) ZICKKNDRAHT, as well as K.K., gives 

 an abnormally great separation. LEHMANN'S value of D\('2) gives 243 greater, making 1st ordinal 

 difference = 3A. K.R's value of D(6) gives 6-965755. 



K. Kl',(oo) from [I.] = 35006-21 1 -55 and agrees well with BBVAN'S measures of high orders, 

 possibly slightly less. For P,(l) K.R give n= 13041-77 and S 13042-96. These, then, give for 

 D() = S() = 21964-44 or less (K.R.) and 21963-25, or less, (S.). The value 21964 has been taken 



