Table 79. 



RATE OF DECREASE OF VAPOR PRESSURE WITH ALTITUDE FOR 

 MOUNTAIN STATIONS. 



(According io the empirical formula of Dr. J. Hann.) 

 h 

 - = io 620 ° 



C, e = Vapor pressures at an upper and a lower station respectively. 

 h = Difference of altitude in meters. 



Table 80. 



DEPTH OF WATER CORRESPONDING TO THE WEIGHT OF A 

 CYLINDRICAL SNOW CORE 2.655 INCHES IN DIAMETER. 



(One-fifth pound equals i inch.) 



Smithsonian Tables. 



194 



