76o EXPERIMENT STATION. [Jan. 



METEOROLOGICAL OBSERVATIONS. 



DEPARTAIEXT OF METEOROLOGY, 

 PROF. J. E. OSTRANDER, HEAD. 



Annual Summary for 1921. 



Pressure (ix In'ches). 

 Maximum reduced to freezing .... 30.56, Jan. 19, 10 a.m. 

 Minimum reduced to freezing .... 29.03, Oct. 20, 3 p.m. 

 Maximum reduced to freezing and sea level . 30.90, Jan. 19, 10 a.m. 

 Minimum reduced to freezing and sea level 29.33, Oct. 20, 3 p.m. 

 Mean semi-daily reduced to freezing and sea level . . . 30.0-40 



Annual range 1.57 



Air Temperature (ix Degrees Fahr.).i 



Highest 96.0, June 22, 3 p.m. 



Lowest — 6.0, Jan. 19, 7 a.m. 



Mean hourh' 49.5 



Mean of means of maximum and minimum 49.8 



Mean sensible (wet bulb) 44.4 



Annual range 102.0 



Highest mean daily 80.6, July 8 



Lowest mean dailj^ 4.0, Jan. 19 



Mean maximum 60.5 



Mean minimum 39.0 



Mean daily range 21.5 



Greatest daily range 48.5, Oct. 15 



Least daily range 3.0, Nov. 19 



HiMIDITY. 



Mean dew point 40.4 



Mean force of vapor 405 



Mean relative humidity 76.0 



WlXD. 



Prevailing direction W. S. W. 



1 Temperature in ground shelter. 



