24b 



DYNAMIC METEOROLOGY AND HYDROGRAPHY. 



Table 13 M. Artificial temperature to be used in table 12 M for calculating- pressures 



in given heights. 



Dynamic 

 Example : meters. 



To calculate the pressure at the height of 5000 



Height of nearest standard surface, 600 m-bars, found as in example to table 9*1 43 2 3 



Difference +677 



Table 10 m (vi) gives for +677 the pressure 550.4 m-bars ; the virtual-temperature diagram giving for the 

 sheet between the surfaces 600 and 550.4 the average virtual temperature 5i table 13 M gives the arti- 

 ficial temperature + 5.1 ; table 12 m gives for temperature 5.1 and height 677 the correction -\- 12 



Sum (artificial height) 689 



Table 10 M (vi ) gives for -(-6S9 the pressure 549.5, which is thus the pressure in the given height of 5000 

 dynamic meters. 



Table 14 M. Specific volume of the air at the standard pressures. 



Proportionality Table. 



Example. 



Column 1. Standard isobaric surfaces. 



2. Virtual temperature at standard surfaces, taken from the virtual 



temperature diagram. 



3. Numbers found from table 14 M for pressures of column 1 and 



temperatures, respectively o, +10, +10, +20. 



4. Numbers found from proportionality table for pressures of col- 



umn 1, and temperatures respectively 5 8, 0.1, 6.5, 4.7. 



5. Sum of numbers in columns 3 and 4, giving the specific volume 



of the air in the standard surfaces of column 1. 



