HYGROMETRICAL TABLES. 



Reduction of psychromctric observations — English measures. 



Values oi e = e' - 0.000367 B (t - t') (i + ^ ~ '^^ j . . Table 82 



Relative humidity — Temperature Fahrenheit .... Table 83 



Reduction of psychromctric observations — Metric Measures, 



Values oi e = e' — 0.000660 B {t — t') (i + 0.00115 t') . Table 84 



Relative humidity — Temperature Centigrade .... Table 85 



Rate of decrease of vapor pressure with altitude Table 86 



Reduction of snowfall measurements. 



Depth of water corresponding to the weight of a cylindrical 



snow core 2.655 inches in diameter Table 87 



Depth of water corresponding to the weight of snow (or rain) 



collected in an 8-inch gage Table 88 



Quantity of rainfall corresponding to given depths . . . Table 89 



