MassachiiM 



amher: 



- Oollege, 



T. MASS. 



BULLETIN No. 435. 



MARCH. 1925 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGIIICULTUIIAL EXPEKIMENT 



STATION. 



L;Uitude, 42° 23' 48.5" N. Longitude 72* 31' 10" W. 



Height of ham meter above ground, 5/' /?. Above sea level, 2jj.^ ft. 

 Height oj Wind Iiistnitnents J2 ft. lime used, y^thMer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing, 30.33, i6th, 8 A. 

 Minimum reduced to freezing, 2^.13, 2Sth 9 A. 

 Reduced maximum reading, 30 64, 16th, 8 A. 

 Reduced minimum reading, 29.42, 28th, 9 A. 



Mean semi-daily reduced 30.070 



Monthly range 1.22 



Air Temperaiure. 



In Degrees Fahr. 



Highest 74.0, 26th, 5.30 p. 



Lowest 70, 3d, 7-30 A. 



Mean hourly 38.S 



Mean of means of max. and niin 391 



Mean sensible (wet bulb) 34.3 



Monthly range 67.0 



Highest mean daily 54.7, 27th 



Lowest mean daily 15.5, 27th 



Mean maximum 49.6 



Mean minimum 28.6 



Mean daily range 21.0 



Greatest daily range 46.5, 26th 



Least daily range 9.0, 30th 



Hamidity. 



Mean dew point 30.3 



Mean force of vapor 230 



Mean relative humidity 78.4 



Precipitation. In inches. 



Total precipitation, in inches 4.12 



Total snow, in inches i 



Number of days on which .01 inch or more 



rain fell i; 



Days of sleighing None 



Wind. 



Total movement 498201 



Greatest daily movement 328m, 15th 



Least daily movement 42m, i8th 



Mean daily movement T6im 



Mean hourly velocity 6.7m 



Maximum pressure per square foot, 9.0 lbs = 



42)n per hour, 21st, 2 P., S. 

 Maximum velocity for 5 minutes, 24m per 



hour, 2ist, 2 p., S. 

 Prevailing direction, W., S.W. 



Summary. 



.South 23 per cent 



-South Southwest 16 " " 



Northwest 13 " " 



North 10 " " 



North Northeast 10 " " 



Other directions 28 " " 



Weather. 



Mean cloudiness observed .... 48 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 179 hours = 48 percent. 



Number of clear days 10 



Number of fair days 9 



Number of cloudy days 12 



Bright Sunshine. 



Number hours recorded, 191 = 52 per cent. 

 Rnin. ist, ;th,6th. loth. nth, 12th, 13th, 14th, 



17th, 19th, 25th, 27th, 28th, 29th, 30th. 

 Snow, ISt. 



Gales, 40m, loth, S. S.W. ; 3Sm, 15th, N.W.; 

 42m, 2ist, S.;36m. 27th. S.; 35m. 2Stli, S. 



