Tables 704 and 705 

 THE EARTH'S ATMOSPHERE 



TABLE 704. — Atmospheric Ozone 



S&3 



This table shows the variation of atmospheric ozone (layer about 40 to 50 km above the 

 earth's surface), with latitude and time of the year, from measures in long-wave portions 

 of Hartley ultra-violet band 0.230 to 0.310 n, by Doctor Dobson and his associates (Proc. 

 Roy. Soc. 110A, 660, 1926 and 122A, 456, 1929); prepared partly from unpublished data. 

 Measures are in cm of ozone at n. t. p. As only one year's observations are available for 

 most stations these figures must be regarded as approximate. 



TABLE 705.— Mean Free Path, Air Molecules 



(Mavis, Terr. Mag., 1928-29.) 



Values of mean free path, X, of air molecules, at different heights, for the density condi- 

 tions of Table 697, col. 9. 



Smithsonian Tables 



