162 



HOWARD E. PULLING 



For convenience in interpreting figure 3, vapor pressures cor- 

 responding to 1, 2, 3 and 4 cm. of precipitable water at sea 

 level and at 1780 meters are given in table 3, using both Hann's 

 and Humphreys' constants. Data showing the effects of various 

 amounts of water in the atmosphere above two different stations 

 in selectively absorbing radiation are given in table 5. 



The oxygen bands, A and B and the two small bands, <oi and 

 are practically 'constant in area at any given station and 



CO-2 



TABLE 2 



Atmospheric absorption bands 



TABLE 3 



Relation of surface vapor pressure to amount of precipitable water 



data showing the extent of their influences are also given in 

 table 5. 



There are two carbon dioxide bands extending from 3.6 p. 

 to 5.4m and from 13.0m to 16.0m 19 but an inspection of figure 2 

 evidences that, because the positions of these bands are in re- 



19 Angstrom, K., Ueber die Bedeutung des Wasserdampfes und der Kohlen- 

 saure bei der Absorption der Erdatmosphare. Ann. Physik. (4) 3: 720-732. 1900. 



Idem. Ueber die Abhangigheit der Absorption der Gase, besonders der Kohlen- 

 saure, von der Dichte. Ann. Physik (4) 6: 163-173. 1901. 



