Tables 115-116. 

 TABLE 115. — Values of 0.378e.* 



This table gives the humidity term 0.3 78^, which occurs in the equation 8 = 80 



= 5o 



B - 0.3786 

 760 



k 

 760 



for the calculation of the density of air containing aqueous vapor at pressure 



e; 80 is the density of dry air at normal temperature and barometric pressure, B the ob- 

 served barometric pressure, and h = B - 0.3 78^, the pressure corrected for humidity. For 



values of ^y-, see Table 113. Temperatures are in degrees Centigrade, and pressures in milli- 

 meters of mercury. 



* Table quoted from Smithsonian Meteorological Tables. 



TABLE 116. — Maintenance of Air at Definite Humidities. 



Taken from Stevens, Phytopathology, 6, 428, 1916; see also Curtis, Bui. Bur. Standards, 11, 

 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. 



