Light Absorption and Fluorescence. 



639 



formula 



/,-! = 



2-6002 x 10 27 



(32 x 1-017 xlO 14 ) 2 -* 2 

 2-6002 xlO 27 



10590 Xl0 27 -z^ 2 

 Values of O-l) 10 s 



X. 



Calculated. 



Observed. 



Differences. 



6708 



25026 



25028 



_2 



6438 



25068 



25069 



-1 



5790 



25192 



25191 



4-1 



5770 



25195 



25195 







5461 



25274 



25270 



4-4 



5209 



25347 



25345 



+2 



5086 



25387 



25380 



+7 



4800 



25494 



25495 



-1 



In order to show how accurately the results appear if the 

 -correct multiple of v y be used, I have calculated out the 

 refractivities of water vapour using the factors 31 and 33 

 instead of 32 as above. The values in the two following- 

 tables are obtained with the formulae 



'*" 1= wmvw^rv" where 9938 " 5 x 1027= (31vy)2 ' 



and 



2-7703 v 10 27 

 ^~ 1= 11262x10^^ Where 11262 X 1027 = ( 33 ^ 



Values of O~l)10 8 

 when ?i = 31. 



Values of (/*-l)10 s 

 when ?i = 33. 



X. 



Calc. 



Obs. 



Diff. 



X. 



6708 



Calc. 



Obs. 



Diff. 



6708 



25010 



25028 



-18 



25038 



25028 



4-10 



6438 



25054 



25069 



-15 



6438 



25077 



25069 



+ 8 



5790 



25187 



25191 



- 4 



5790 



25194 



25191 



+ 3 



5770 



25192 



25195 



- 3 



5770 



25198 



25195 



4- 3 



5461 



25274 



25270 



+ 4 



5461 



25271 



25270 



4- 1 



5209 



25352 



25345 



4- 7 



5209 



25340 



25345 



- 5 



5086 



25396 



25380 



4-16 



5086 



25378 



25380 



_ 2 



4800 



25509 



25495 



4-14 



4800 



25480 



25495 



-15 



The progressive change in the errors column is manifest. 



2 U2 



