BULLETIN No. 476. 



AUGUST, 1928 



Meteoroloo'ical Observations 



AT THE 



MASSACHUSETTS 



AGKICULTUKAL EXPElilMENT 



STATION. 



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



Height of barometer above ground, 36 ft. Above sea level, 2^j.^ ft. 

 Height oj Wifid Instrufiie/its 6y ft. Time used, j^thMer. 



MONTHLY SUMMARY. 



Pressiite. In inches. 



Maximum reduced to freezing, 30.17, 27th. 8a. 

 Minimum reduced to freezing, 28.96, iStli, 8 p 

 Reduced maximum reading, 30.34, 271!^, 8 a. 

 Reduced minimum reading, 29.66, i8th,8 p. 



Mean semi-daily reduced jO-oS' 



Monthly range 68 



Air Teiiiperaliire. 



In Degrees Fahr. 



Highest 92.0, 3rd, 3-30 p.. 4th, I p 



Lowest 52.0, 13th, 4-30 A 



Mean hourly 70. f 



Mean of means of max. and min 72.0 



Mean sensible (wet bulb) 66.8 



Monthly range 40.0 



Highest mean daily 78.1,29th 



Lowest mean daily 60.0,7th 



Mean maximum Si. 6 



Mean minimum 62 



Greatest daily range 350, 14th 



Least daily range 5.0, 25th 



Hnmidity. 



Mean dew point 63.2 



Mean force of vapor 732 



Mean relative humidity 86. 



PrecipHation. In inches. 



Total precipitation, in inches S.40 



Number of days on which .01 inch or more 

 rainfall M 



Total movement 3090m 



Greatest daily movement 169m, 31st 



Least daily movement 37m, 14th 



Mean daily movement 99.7ni 



Mean hourly velocity 4.1m 



Ma.ximum pressure per scjuare foot, 4.5 lbs = 



30m per hour, 5th, 12M. 

 Maximum velocity for 5 minutes, 30m per 



hour, 5th, 12 M. 



Prevailing direction. South Southeast 

 Summary. 



South Southeast 30 per cent 



West Southwest 16 " " 



North Northwest 13 " " 



South Southwest 10 " " 



North Northeast 6 " " 



East Northeast 6 " " 



( )ther directions 19 " " 



Weather. 



Mean cloudiness observed .... 60 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 22 6hours = 53 per cent 



Number of clear days 7 



Number of fair days 6 



Number of cloudy days 18 



Bright Sunshine. 



Number hours recorded, 203= 47 per cent. 



Kain. ist, 3rd, 4th, 5th, 6th, 7th, loth, 17th, 

 18th, 22nd, 23rd, 25th, 26th, 28th, 30th 



Thunder and Liiihininii. 3rd, 4th, 5th, 10th, 



18th, 2ISt, 30th. 



