REDUCTION OP HUMIDITY DATA VON BEZOLD 



S3 1 



where e is the vapor pressure at sea-level and h is the altitude in 

 meters. 4 



This being premised I obtain the following table i and arrange 

 the columns in the order in which they are derived from each other, 

 i. e., first the altitude and the accompanying temperature, then the 

 air pressure and vapor pressure, then values of x and x/x deduced 

 from these, where x is the value at the surface of the ground, 

 expressed in grams of water per kilogram of dry air, and finally the 

 computed values of the absolute and relative humidity. 



TABLE 1 



<5X 



j8 R 



In order to make the course of these numbers perfectly clear the 



quantities /?, e, x and R 

 are represented by 

 curves in fig. 52, where 

 the altitudes are ordin- 

 ates, and the'correspond- 

 ing values of the other 

 quantities are abscissae. 

 In-explanation of this 

 diagram it need only be 

 added that the distance 

 between two consecutive 

 vertical lines is taken as 

 unity in plotting the 

 quantities e and x but is 

 taken as 10 in plotting 

 relative humidity and as 

 FIG 50 in plotting barometric 



pressure. 



The numbers, as also the accompanying diagram, now show clearly 



4 Suring: Wiss. Luft., Vol. Ill, p. 160. 



