12c 



DYNAMIC METEOROLOGY AND HYDROGRAPHY. 



Table 12 A. Virtual temperature of saturated air in degrees Fahrenheit, the pressure 



being given in incites of mercury. 



Example : 



Pressure 26.79 inches of mercury, temperature 37-5 F. Table 12 A gives 1.6. 



81 per cent of 1.6 gives 1.3 F. 



Virtual temperature 38.8 F. for air of 37.5 F. and 81 per cent relative humidity at the 



pressure of 26.79 inches. 



