MISCELLANEOUS TABLES. Ixxxi 



Table 1 03. Term for humidity; auxiliary to Table 102. 



,,.,., h B — o.^ySe 



Table 104. Humidity and pressure term. = 



^ ^ 29.921 29.921 



Table 1 OSgives values of 0.378 e to three decimal places as an aid to the 

 use of Table 104. The argument is the dew-point given for every degree 

 from —60° F. to + 140° F. The second column gives the corresponding values 

 of the vapor pressure {e) derived from Tables 74 and 75. 



, , , . , r h 5 — 0.378 e , , 



Table 1 04 gives values and logarithms of = ^^ for values 



29.921 29.921 



of // extending from lo.o to 31.7 inches. The logarithms are given to five 

 significant figures and the corresponding numbers to four decimals. 



Example : 



The air temperature is 68° F., the pressure is 29.36 inches and the dew- 

 point 51° F. Find the logarithm of the density. 

 Table 102, for / = 68° F., gives 7.08085-10 



Table 103, for dew-point 51°, gives 0.378 ^ = 0.142 inch, 

 Table 104, for /! = 5 — 0.378 ^ = 29.36 — 0.14 = 29.22, gives 9.98941 — 10 



30 



Logarithm of density= 7.07056— 10 



METRIC MEASURES. 



Table 105. Temperature term. 



This table gives values and logarithms of the expression 



_ 0.0012930 

 ^''^'""1+0.00367^ 

 for values of / extending from — 34°C. to -1-69° C. The tabular values are 

 given to five significant figures. 

 Table 106. Term for humidity; auxiliary to Table 107. 



^ ^ . , . , h B — o. 378 e 



Table 107- Humidity and pressure terms. — -r- = 7 



760 760 



Table 106 gives the values of 0.378 e to hundredths of a millimeter for 

 dew-points extending from —50° C. to +60° C. Above —25° C. the interval 

 is one degree. The values of the vapor pressure, e, corresponding to these 

 dew-points, given in the second column,* are taken from tables 76 and yj. 



Table 107 gives values and logarithms of --:— = -^ • for 



^ ^ ^ 760 760 



values of h extending from 300 to 799 mm. The atmospheric pressure B is 

 the barometer reading corrected for gravity and 0.378 e is the term for 

 humidity obtained from Table 106. The logarithms are given to five signif- 

 icant figures and the corresponding numbers to four decimal places. 



6 



