222 



BIOLOGICAL EFFECTS OF RADIATION 



Table 6. — Coordinates of Stations in Tropical, Subtropical, and Arctic 



Regions 

 1. Radiation intensity at normal incidence 



2. Radiation intensity on a horizontal surface 



Habana, Cuba (8) 



Johannesburg, S. Afr. (8) 



Abisko, Sweden (4) 



Green Harbor, Spitzbergen (11). 

 Sveanor (3) 



82° 21' W. 

 28° 4' E. 

 18° 49' E. 

 14° 05' E. 

 18° 18' E. 



131 

 6102 

 1280 



Weather Bureau 



thermoelectric 

 Callendar 



Angstrom 



M oll-Gorczy nski 



Robitzsch 



Table 7. — Radiation Intensities at Normal Incidence 



(gm. cal./min./cm.^) 



Apia, Samoa 



Solar-zenith distance 



Air mass 



Dry season, May- Aug 



Equatorial season, Mar.-Apr., Sept. -Oct 

 Wet season, Nov.-Feb 



78 °7 

 5.0 

 0.56 

 0.62 

 0.84 



Abisko, Sweden 



July . 

 Aug. 

 Sept . 



1.17 

 1.16 

 1.11 



0.98 

 0.97 

 0.97 



Mount Evans, Greenland 



