3 20 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 51 



Table 4. Average kilograms of water contained 

 in a vertical column of atmosphere, one 

 square meter section, for each season 



(46) FOR INTERVALS OF ALTITUDE 



-20' -70' 0' 10' 2Q- 



— <tooom 



■500 mm 



The numbers here given are of such nature that they have no 

 claim to great accuracy, since in the passage from the numbers given 

 by Berson and Suring for different altitudes, as presented above in 

 table 2, errors slipped in because the relations between pressure and 

 altitude change for different temperatures. 



For the same reason also in the diagrams, figures 48 and 49, 



drawn for different pressures there 

 should, strictly speaking, be drawn 

 different scales of altitude for the 

 different seasons of the year. Since, 

 however, the application of more ac- 

 curate methods of computation 

 would have caused a disproportion- 

 ate amount of labor and since the 

 gain in reliability would still be 

 on small, therefore, and for simplicity, 

 we may be satisfied with the scale 

 of altitudes based on the tempera- 

 ture deduced from the totality of all the observations, as Ave find it 

 under t m in table 1. 



— lOOOm 



W FH 

 FIG. 48 



