BULLETIN No. 47 1. 



MARCH, 1928 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, ^i ft. Above sea level, 2Yj.j ft. 

 Height oj IVind Instruments J 2 ft. Time used, y^th Mer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, 30.16, 6th, up 

 Minimum reduced to freezing, 28.90, 27th, 11 A 

 Reduced maximum reading, 30.48, fcth, 11 P. 

 Reduced minimum reading, 29.20, 27th, 11 A 



Mean semi-daily reduced 29.880 



Monthly range 1.28 



Air Temperature. 



In Degrees Fahr. 



Highest 68.0, 24th, 3-30P. 



Lowest 8.,iith,6A. 



Mean hourly 32.86 



Mean of means of max. and min 33.1 



Mean sensible (wet bulb) 24.6 



Monthly range 60 o 



Highest mean daily 53.3,25th 



Lowest mean daily .19.1, 6ih 



Mean maximum 41.4 



Mean minimum 24.9 



Mean daily range 16.5 



Greatest daily range 42.0, 24th 



Least daily range 5.0, i8th 



Humidity. 



Mean dew point 26.2 



Mean force of vapor 189 



Mean relative humidity So. 2 



Precipitation. In inches. 



Total precipitation, in inches 1.17 



Number of days on which .01 inch or more 



rain fell 7 



Total sniiw in inches 124 



Days of sleighing 3 



Wind. 



Total movement 6613m 



Greatest daily movement 39im, 5th 



Least daily movement 76m, 12,30th 



Mean daily movement 213m 



Mean hourly velocity 8.9m 



Maximum pressure per square foot, 13.0 lbs = 



51m per hour, 3rd. 1 A., W. 

 Maximum velocity for 5 minutes, 30 ni per 



hour, 27th, 12 P., N.W. 

 Prevailing direction. West Northwest. 



Summary. 



Northwest . . . • " 16 per cent 



-Southwest 20 " " 



West Northwest 26 " " 



Other directions 38 " " 



Weather. 



Mean cloudiness observed .... 52 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 157 hours = 42 per cent 



Number of clear days n 



Number of fair days 12 



Number of cloudy days 8 



Bright Sunshine. 



Number hours recorded, 214= 58 per cent. 



Kain. I2th, 14th, l8th, 22nd, 27th. 30th. 



Snow, ist, 2nd, 4th, 7th, 9th, loth, 15th, iSth, 

 20th, 22nd, 30th, 31st. 



Gales, 43m, ist W.N.W.; 38m, 2nd, W. N.W.; 

 51m, 3rd, W.; 44m, 4th S.; 43m, 5th, 

 W.N.W.: 35m, 6th, N. W.; 35m, 7th, 

 S.S.W.:36m, 15th, N.W.;35m. i8th, 

 N.E.; 35ni, 24th, S.S.W.; 45m, 27th, 

 N.W.; 38m, 28th, W.; 40m, 31st, \S . 

 N.W. 



