TABLES 190 (concluded), jgj. 



TABLE 190 (concluded). Relative Humidity. 



(Data from 20 to 60 C. based upon Table 185). 



189 



TABLE 191. Relative Humidity. 



This table gives the relative humidity direct from the difference between the reading of the dry (t C.) and the wet 

 (t! C.) thermometer. It is computed for a barometer reading of 76 cm. The wet thermometer should be ventilated 

 about 3 meters per second. From manuscript tables computed at the U.S. Weather Bureau. 



SMITHSONIAN TABLES. 



