Absorption System of Sulphur Dioxide. 515 



Table II. 

 Infra-red Absorption Spectrum of Hydrogen Sulphide, 



Factors. 



1/A. 



A Calc. 



A Obs .* 



Difference. 



43-2x21 



907-2 



1102 fx 



1095 n 



-007 



43 2x22 



950-4 



10-52 



10-6 



+0-08 



432x23 



9936 



1006 



1008 



+0-02 



43-2x24 



10368 



9-65 



9-65 



000 



43-2x273 



1179-4 



8-48 



8-46 



-0-02 



43-2x30 



12960 



7-72 



7-78 



+0-06 



43-2x33 



1425-6 



702 



712 



4-0-10 



43-2x41 



17712 



5-65 



5-6 



-005 



432x54 6 



2358-8 



1 



4-24 



i 



4-24 



000 



* Coblentz, he. cit. 



Table III. 

 Infra-red Absorption Spectrum of Oxygen. 



Factors. 1/A. 



A Calc. 



A Obs. Differences. 



96-433x22 212L53 



96-433x33 j 318229 



I 



4-71,1 



3-14 



4-7/x -00L 

 3 2 4-0-06 



We have now, therefore, three basis constants, namely, 

 2*73,4*32, 8'] 77, and from these three, combinations may 

 be made as follows :— 8*177 X 2-73 = 22*3225, 8*177 x 4*3*2 

 = 35-324, and. 2-73 x 4-32 = 11-794. Of these, 22*3225 x 10 

 is the value of the constant difference in the less refrangible 

 ultra-violet absorption band of sulphur dioxide, 35*324 x 10 

 is the constant difference in the more refrangible band, 

 while 11*794x10 is that found in the region intermediate 

 between the two bands. 



It is now possible to calculate the wave-numbers of all 

 the lines in the less refrangible ultra-violet band of sulphur 

 dioxide. The true wave-number of the central line is known, 

 and also the whole band group is known to be sub-divided 

 into a series of sub-groups with a constant difference of 

 223*225 between the wave-numbers of their central lines. 



2 M2 



