Tables 130 and 131 j-yq 



DENSITY OF MOIST AIR 



TABLE 130. — Values of 0.378e * 



u 



This table gives the humidity term 0.378c, which occurs in the equation 5 = 5 



760 



= So -7 for the calculation of the density of air containing aqueous vapor at pressure 



e; 5 is the density of dry air at normal temperature and barometric pressure, B the ob- 

 served barometric pressure, and h = B - 0.378c, the pressure corrected for humidity. For 



values of — , see Table 128. Temperatures are in degrees Centigrade, and pressures in milli- 

 meters of mercury. 



* Table quoted from Smithsonian Meteorological Tables. 



TABLE 131. — Maintenance of Air at Definite Humidities 



Taken from Stevens, Phytopathology, 6, 428, 1916; see also Curtis, Bui. Bur. Standards, n. 

 359, 1914; Dieterici, Ann. d. Phys. u. Chem., 50, 47, 1893. The relative humidity and vapor 

 pressure of aqueous vapor of moist air in equilibrium conditions above aqueous solutions of sul- 

 phuric acid are given below. 



Smithsonian Tables. 



