So 



DYNAMIC METEOROLOGY AND HYDROGRAPHY. 



different observations were taken, it will be the best plan, exactly as in the preced- 

 ing case, to change at once the given observations to rational units, and proceed as 

 in example i. 



Tressurz 

 TrvriuoP 



mercury 



voo 



300 



Wo 



soo 



600 



lOO 



soo 



IY&SSUT6 



m-Txzrs 



zoo 



300 



wo 



soo 



GOO 



700 



800 



900 



10OO 



-20 -iO O 



Temperature. C. 



10 



SO 30 



Fig. 8. Virtual-temperature diagram, pressure in millimeters of mercury. 



