Bigelow — Radiation in 'the Earth? s Atmosphere. 257 



series of balloon soundings as extended to cover the hemis- 

 phere provisionally, and to represent the average summer con- 

 ditions of the northern hemisphere. 



On examining the relations between A and log C, it is to be 

 noted that they increase and diminish together, apparently in 

 a simple linear relation. Accordingly these values have been 

 collected in two groups, and the means taken by sets, including 

 the same integer of A. 



Table 2. 

 The Mean and Adjusted Values of A and log C. 





Lindenburg 





Adjusted 





and the Tropics 



Northern Hemisphere 



Values 



No. 



A 



logC 



No. 



A 



log C 



A 



logC 



10 



2*749 



- 2-900 









3 



— 3-740 



47 



3*562 



— 4*797 



21 



3-740 



— 5-402 



4 



— 5-960 



60 



4-420 



- 7-115 



41 



4-515 



— 7-138 



5 



— 8-180 



25 



5-418 



— 8953 



53 



5-486 



— 9-274 



6 



— 10-400 



17 



6-509 



— 11-738 



9 



6 307 



— 10-967 



7 



— 12-620 



5 



7-464 



— 14 322 



3 



7-397 



— 13*548 



8 



— 14-840 



1 



8230 



— 16-689 











9 



— 17-060 



4 



9-523 



— 19-584 



-- 



--- 



--- 



10 



— 19-280 



The first column under each group gives the number of 

 observations, the second the value of the exponent A, and the 

 third the value of log C as the mean. 



Plotting these data on fig. 1, they fall generally on a straight 

 line whose equation may be written, 



log C = log C + (A - 4) log B, (8) 



A - 4 

 C-C B , (9) 



log C = - 5-960 — 2-220 (A — 4), (10) 



where log C = — 5*960, log B = - 2-220. 



The form of this equation is the same as that for the incom- 

 ing radiation in the atmosphere 



i = i„ P m 



and their relations may be examined. 



