Bigelow — Radiation in the Earths Atmosphere. 263 



By a process of general reasoning Humphreys assumes that 

 K,/K = b = -J-, and this can now be readily tested. Take 

 the data from Table 9 for a, and thence log c by Table 3, for 

 the latitudes 90°, 50°, 0°, and extract the respective values for 

 the surface and at the bottom of the isothermal layer, and we 

 have 



Lati- 

 tude 



a a x 



logc 



logc, 



^0 



C\ 



"o 

 1-01 



c o 

 Ci 



90° 



3-86 3-83 



— 5-649 



— 5 583 



4*46X10- 



5 3-83X10" 5 



1-16 



50° 



3-84 3-82 



— 5605 



— 5-560 



4*03X10- 



5 3-63X10- 5 



1-01 



I'll 



0° 



3*82 3*78 



— 5-560 



— 5-472 



3-63X10- 



5 2-97X10- 5 



1-01 



1*22 



Hence, 



0-87 T, 



1-15 T . 



Check the formula against the data of Table 4. 



Ascension 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



t,~ 



211° 



213° 



226° 



215° 



220° 



213° 



204° 



205° 



204° 



__ 



T. 



242 



245 



260 



247 



253 



245 



235 



236 



235 



— 



•forT. 



V5 



7-8 



3-5 



9-3 



8-0 



9-2 



10-2 



10-2 



11-3 



— 



There is no evidence that the assumed effective radiation strata 

 are located at these elevations, z in kilometers. But assume 

 that the effective radiations are those given in Table 5, and 

 then the values of 1/b, the ratio of K at the surface to K x at 



the isothermal level, are 



Ascension 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



l/b=KJK 1 .. 



3-70 



3-78 



2-47 



4-14 



4-43 



4-72 



5-35 



5 21 



5-14 



- 



Means 3*52 at 50° 4-58 at 30° 5*23 at 10° 

 T = 1'35T 1 T =l-4lT 1 T = 14,1 T 1 



T (computed) 

 T (observed) . 



285° 

 281 



288° 

 293 



305° 



283 



290° 

 305 



310° 

 297 



300° 

 304 



3<»0° 

 299 



301° 

 298 



300° 

 300 



— 



