TABLES 186-188. 

 TABLE 186. Weight in Grams of a Cubic Meter of Saturated Aqueous Vapor. 



185 



TABLE 187. Weight in Grains of a Cubic Foot of Saturated Aqueous Vapor. 



Tables are abridged from Smithsonian Meteorological Tables, fourth revised edition. 



TABLE 188. Pressure of Aqueous Vapor in the Atmosphere. 



For various altitudes (barometric readings). 



The first column gives the depression of the wet-bulb temperature t\ below the air temperature t. The value cor- 

 responding to the barometric height at the altitude of observation is to be subtracted from the vapor pressure corre- 

 sponding to the wet-bulb temperature taken from Table 185. The temperature corresponding to this vapor pressure 

 taken from Table 185 is the dew point. The wet bulb should be ventilated about 3 meters per second. For sea-level 

 use Table 189. Example: / = 35, h = 30, barometer 74 cm. Then 31.83 2.46 = 29.37 mm = aqueous vapor 

 pressure; the dew point is 28.6 C. 



Abridged from Smithsonian Meteorological Tables, 1007. 



SMITHSONIAN TABLES. 



