BULLETIN No. 446. 



FEBRUARY 1926 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGllICULTUMAL EXPERIMENT 



STATION. 



Latitude, 42° 23' 48.5" N. Longitude 72* 31' 10" \V. 



Height of barometer above ground, J/" //". Above sea level, ^/j.j- ft. 

 Height oj Wind Instruments 12 ft. Time used, j^thMer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, 30.07, 3d, 8 A 

 Minimum reduced to freezing, 28.89, 19th, 3 p- 

 Reduced maximum reading, 30.40, 3d, 8 a 

 Reduced minimum reading, 29.20, 19th, 3 p. 



Mean semi-daily reduced 29.S74 



Montfily range 1.20 



Air Xemperature. 



In Degrees Fahr. 



Highest 43.0, 25th, 7 p 



Lowest -7.0,9th, 7 A. 



Mean hourly 23.1 



.Mean of means of max. and min 22.6 



Mean sensible (wet bulb) 20.1 



Monthly range 50.0 



Highest mean daily 35.7, 15th 



Lowest mean daily 7.7,9th 



Mean maximum 31.7 



Mean minimum 13.5 



Mean daily range 18.2 



Greatest daily range 35.5, 24th 



Least daily range 4.0, 22d 



Hnmidity. 



Mean dew point 15.3 



Mean force of vapor 78.1 



Mean relative humidity 124 



Precipitation. In inches. 



Total precipitation, in inches 5.01 



Total snow, in inches, 323 



Number of days on which .01 inch or more 



rain fell 11 



Days of sleighing, 28 



Wind. 



Total movement 5273m 



Greatest daily movement 415m, 4th 



Least daily movement 24m, 13th 



Mean daily movement 1S8 m 



.Mean hourly velocity 7.Sni 



Maximum pressure per square foot, 12.0 lbs = 



49U1 per hour, 4th, 12 m., N. 

 Maximum velocity for 5 minutes, 30m per 



hour, 4th, I p., N. 

 Prevailing direction. Northwest. 

 Summary. 



Northwest 21 per cent. 



North 18 " " 



West 14 " " 



North Northwest 11 " " 



Other directions 36 " " 



Weather. 



Mean cloudiness observed .... 49 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 148 hours = 50 per cent 



Number of clear days 10 



Number of fair days 7 



Number of cloudy days 11 



Bright Sunshine. 



Number hours recorded. 148 = ;o per cent. 



Rain, ist, i8th, 19th, 25th. 

 Hail. 25th. 



Snow, ist, 3d, 4th, 6th, 7th, loth, 14th, 14th, 

 19th, 2ist, 26th, 26th. 



Gales, 49ni. 4th, N.: 39m. loth, N.N"E ; 36m. 

 nth, N. N. W.; 40m. i6tl-, N. W.; 45111. 

 20th, N. N. W;, 40m. 26th, W. 



