456 



MEASURING OF AIR. 



TABLE I (c) 



Test 

 No. 



Barometer 

 inches 



Dry Bulb 



Humidity 



/ 

 inches 



n 



IV 



\^ 



VI 



24.918 

 24.867 

 24.861 

 24.863 



20.4 

 2.2.2. 

 22.9 



21.5 



38.0 



30.7 

 32.8 



30.7 



0.266 

 0.240 

 0.268 

 0.226 



The Table I (c) reduces for standard \aluc of graxity to 

 TABLE II. 



Test Barometer Air Tcmjierature f 



No. pa Ibs/sq.in. ^F. °F(abs) Ibs/sq.inch 



From these data and from No. 28 of Smithsonian tallies we 



hnd the weight of moisture present as per Table HI. The weights 



of working air are given in table IV and the values of R. « and 



4 



-^ , for each Test are calculated in table V (a) and (b). 



.)n — 1 



Test 



11 

 IV 

 V 

 Yl 



TABLE HI. 

 JVc'uiht of moisture present. 



Humidity 



38.0 



30-7 

 32.8 



30.7 



Grs/cu.ft. 



2.908 

 2.612 

 2.899 

 2.;o6 



Ibs/cu.ft. 



0.000415 

 0.000373 

 0.000414 

 0.000358 



