BULLETIN No. 399. 



MARCH. 1922 



Meteorolooical Observations 



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AT TllK 



MASSACHUSETTS 



AGRICULTUML EXPEUIMENT 



STATION. 



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



tlei,^lit of barometer above ground, 51 ft. Abo7<e sea level, 2jj.^ ft. 

 Height oj Wind Instruments J2 ft. Time used, y ^th Mer. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Maxiniuni reduced to freezing, Jo. 31, ist, 10 A 

 Minimum reduced to freezing, 29.02, 7th, 7 p 

 Reduced ma.xinuim reading 30-63. ist, 10 a 

 Reduced minimum reading, 29.32, 7th, 7 p 



Mean semi-daily reduced 3010' 



Monthly range 1.31 



Air Temperatore. In Degrees Fahr. 



Highest 72.0, 26th, 4 P 



Lowest 7.0, 4th, 7:30 A 



Mean hourly 34-5 



Mean of means of max. and min 35.3 



Mean sensible (wet bulb) 31.4 



Monthly range 65.0 



Highest mean daily 52.7. 26th 



Lowest mean daily ........ 17.;, ith 



Mean maximum 44.6 



Mean minimum 26.0 



Mean daily range 18.6 



Greatest daily range 39-5 '-Sth 



Least daily range 4.0, 20th 



Humidity. 



Mean dew point 27.1 



Mean force of vapor 209 



Mean relative humidity 77.6 



Precipitation. In inches. 



Total precipitation, in inches 5.34 



Number of days on which .01 inch or more I 



rain fell Mi 



Total .Snow in inches 94 



Days of sleighing 6 



•Temperature in ground shelter. 

 ••Reduced to freezing and sea-level. 



Mind. 



Total movement 4883 m 



Greatest daily movement 351m, 8th 



Least daily movement 19m, 4th 



Mean daily movement 158m 



Mean hourly velocity 6.6m 



Maximum pressure per square foot, 20.0 lbs = 



63m per hour, 7th, 6 P, S. 

 Maximum velocity for 5 minutes, 22, ni per 



hour, 7th, 7 p., S. 

 Prevailing direction, Northwest. 

 Summary. 



Northwest 19 per cent 



West Northwest 16 " 



North Northwest 10 " " 



West Northwest 18 " " 



North Northeast - . . 13 " " 



Other directions 42 " " 



Weather. 



Mean cloudiness observed .... 49 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 193 iiours = 52 per cent. 



Number of clear days 9 



Number of fair days 8 



Number of cloudy days 14 



Bright Sunshine. 



Number hours recorded, 178, = 48 per cent. 

 Rain, 4th, 5th, 7th, Sth. 19th, 20th, 21st, 27th, 



2Sth. 29th, 30th, 31st. 

 Snow, 2d, 5th, Sth, nth, i6th, 21st, 30th, 31st. 

 Hail, 4th, 31st. 



Thunder and Liiihtninii. 29th, 30th. 

 Gales, 63m, 7th, S.; 4Sm, Sth, W.N.W.: 37m., 



29 th. N.W. 



