24a 



EXPERIMENT STATION. 



[Jan. 



METEOROLOGICAL OBSERVATIONS. 



DEPARTMENT OF METEOROLOGY, 

 PROF. J. E. OSTRANDER, HEAD. 



Annual Summary for 1922, 



Pressure (in Inches). 

 Maximum reduced to freezing .... 

 Minimum reduced to freezing .... 

 Maximum reduced to freezing and sea-level . 

 Minimum reduced to freezing and sea-level . 

 Mean semi-daily reduced to freezing and sea-level 

 Annual range ....... 



30.36, Jan. 25, 10 a.m. 

 28.60, Oct. 11, 12 P.M. 

 30.70, Jan. 25, 10 a.m. 

 28.92, Oct. 11, 12 P.M. 

 . 30.058 

 1.78 



Air Temperature (in Degrees Fahren- 

 heit). 1 

 Highest . . 94.0, July 12, 4.00 p.m. 



Lowest . —13.5, Feb. 18, 7.30 a.m. 



Mean hourly . . . .47.2 



Mean of means of max. and min. . 47.8 



Mean sensible (wet bulb) 

 Annual range 

 Highest mean daily 

 Lowest mean daily. 

 Mean maximum 

 Mean minimum 

 Mean daily range . 

 Greatest daily range 

 Least daily range . 



Humidity. 

 Mean dew point 

 Mean force of vapor 

 Mean relative humidity . 



43.0 



. 107.5 



. 76.7, Aug. 16 



—0.8, Feb. 17 



. 58.3 



. 37.3 



21.0 



. 43.5, Apr. 10 



. 3.5, Nov. 7 



39.2 

 380 



78.7 



Prevailing direction 



Wind. 



West 



Summary. 

 South Southwest . . .19 per cent 



Northwest . . . . 12 " 



North 10 " 



West Northwest . . . 10 ]| 



Southwest . . . . 10 " 



Other directions . . . 39 " 



Total movement , . . __ 49,970 m. 



Greatest daily movement 467 m., Dec. 6 



Least daily movement . 12 m., Jan. 17 



Mean daily movement . . . 137 m. 



Mean hourly velocity . . .5.7 m. 



Maximum pressure per square foot, 30.0 lbs., 



= 78 m. per hour, Jan. 22, 12 m., W. 

 Maximum velocity for 5 minutes, 42 m. per 



hour, Jan. 22, 12 M., W.; June 12, 2 p.m., 



W.N.W. 



Precipit.\tion (in Inches). 

 Total precipitation, rain or melted 



snow . . . . .45.94 



Snow total in inches . . . 58 1 



Number of days on which .01 or 



more rain or melted snow fell . 120 



Weather. 



Mean cloudiness observed . 45 per cent 



Total cloudiness recorded by Sun 



Thermometer . 1,932 hrs. =43 per cent 



Number of clear days . . . 117 



Number of fair days . . . 127 



Number of cloudy days . . . 121 



Bright Sunshine. 

 Number of hours recorded, 2,522 hrs. =57 per 

 cent. 



Last 

 First 



Dates of Frosts. 



Dates of Snow. 

 Last ..... 



First 



Total days of sleighing . 



May 12 

 Sept. 19 



April 23 



Nov. 24 



74 



Gales of 50 or More Miles per Hour. 



Jan. 22, 78 m., W.; Mar. 7, 63 m., S.; 

 April 20, 53 m., W.N.W. ; June 12, 56 m., 

 W.N.W. ; July 8, 57 m., S.S.W.; Dec. 29, 



57 m., N. 



' Temperature in ground shelter. 



