no. 3 



RADIATION OF THE ATMOSPHERE ANGSTROM 



61 



The results of these measurements for various conditions are 

 given in table IX. Four series, representing' different conditions 



90 80 70 60 50 40 30 20 10 o 10 20 



Fig. 10. 



in regard to the prevailing humidity, were taken at Bassour, Algeria, 

 at a height of 1,160 m. above sea level. Two series were taken on 



Introducing this in (1) and integrating between the limits and m, we 

 obtain for the radiation to the whole strip : 



T'=Trma' 2 



2{m~-\ ) 



ds 



(2) 



My instrument contained two radiating strips : For the one was : m — 9.0 ; 

 n = 2.0. For the other one : m = 9.0 and n = 6.0. Further I had : R = 68.3 ; 

 P = 19.6. 



As my unit of radiation, I will now define the radiation from a surface 

 equal to the surface of the strips within a solid angle whose cross-section 

 is a square, and each side of which subtends one degree. Introducing the 

 given values of a, m, n and R in (2), I then find that the mean radiation from 

 the two strips is 768.6 times my unit of radiation. 



