~* o 



For 



given by Carbon and some of its Compounds. 125 



The formulae employed are :— - 



*iYxK O.F.= -24654-04 + 15-094m 2 [m = 53.54.55], 



O.F. = -23784-84 + 14-841m 2 [m=53.54.55.56], 



« 5 7e 



a 2 y a ° 2 e i 



a 3 y 3 £ 3 e 2 (1) O.F.=* -23015'67 + 14-6184m 2 [>53.54.55.56.57], 

 ? e 3 (2) O.F.= -22138-65 +14-355m 2 [m53.54(55)56.57], 

 ? e 4 (3) O.F.= -21396-13 +14-1293m 2 [m53.54(55)56.57]. 



There is little doubt that the older measurements of the 

 red lines are in error, and I have not found it possible to 

 combine Deslandres' five formulae into one. The following 

 is a more satisfactory formula, for which I am indebted to 

 my friend, Rev. P. H. Jones, M.A., R.N. 

 O.F.(myacMo) = 2407-015-19-6( i 9 + -00309) 2 + ll-6422(m + -83429L) 2 

 where ^=45, 44, 43, and m = 63, 64, 65, 66, 67, 68, 69. 



The following table shows the agreement between the 

 calculated values and those observed. 



Observed. 



Calculated Values (in Air). 



Observed. 



Angstrom & 

 Tbalen. 



Deslandres. 



Jones. 



Fowler. 



61882 



(53)6188-06 



(45,67)6191-02 



61911 



61199 



6117-98 



6121-80 



6121-8 



6057-3 



6056 01 



6059-98 



60599 



6001-8 



6996*19 



6005-18 



6005 1 



5954 5 



594903 



5967 02 



59582 



Kayser & Kunge. 



Komp. (I. A.) 



5635 43 



(54) 5635-40 



(45, 68) 5635-715 



5635 504 



5585-50 



5585-48 



5565-500 



5585-493 



554086 



5540-95 



5541-181 



5540890 





54^9-17 



5502-364 



5501-914 





5466-55 



6468-906 



5572670 



Leinen. 



5165-30 



(55) 5165-27 



(45, 69) 5165-592 



5165473 



5129-36 



5130-42 



5129578 



5129-579 





509901 



5098134 







507085 



5071-254 





Hindrichs. 



4737-18 



(56) 4737-28 



(44, 69) 4736-131 



4737147 



471531 



4715-86 



4715523 



4715453 



469757 



469809 



4697 632 



4697-001 



468494 



4684-94 



4683-415 



4083 491 







4671791 



4672-979 



Eder & Valeuta. 



4381-93 



(57) 438066 



(43,69)4381-65 



4380-91 



4371-31 



437090 



4370-85 



437114 



436501 



4364-27 



436295 



4364-27 



