290 Table 71 



DENSITY OF AIR 



The density p of air, in cgs units, is given by 



P= ^k' (1) 



where 



p = total barometric pressure, dynes, cm. -2 , 

 R = gas constant for dry air, 2.8704 X 10 8 erg g." 1 "K." 1 , 

 T't = adjusted virtual temperature of the air, °K. (see Table 72). 



For pressure p measured in millibars, the density p in kg. m. -3 (1 kg. m. -8 = 10"* g. cm." 1 ) 

 is 



P = 0.34838 4- (2) 



For p = 1013.25 and T' v = 273.16 °K. (0 °C), P = 1.2923 X 10" 8 g. cm."* 



(continued) 



SMITHSONIAN METEOROLOGICAL TABLES 



