Ma^.^ 



A IV 



BULLETIN No. 440. 



^■olltgS, 



AUGUST, 1925 



Meteorological Observations 



AT TIIK 



MASSACHUSETTS 



AGIIICULTUIUL EXPEllIMENT 



STATION. 



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



Height^/ barometer above ground, 51 ft. Above sea level, 2yj.j ft. 

 Height oj Wind Itistrutnenis 72 ft. 2'ime used, y^th Mer. 



MONTHLY SUMMARY. 



Pressiite. In inches. 



Maxinuim reduced to freezing, 30.12, 29th, 8 a. 

 Minimum reduced to freezing, 29.46, ist, 3P- 

 Reduced maxinnim reading, 30.42, 29th, 8 A. 

 Reduced minimum reading, 29.72, ist, 31". 



Mean semi-daily reduced 30.058 



Monthly range 0.70 



Air Temperature. In Degrees Fahr. 



Highest 90.5, 18th, 4 P 



Lowest 39.0, 29th, 630 A. 



Mean hourly 67.7 



Mean of means of max. and min 6S.0 



Mean sensible (wet bulb) 62.3 



Monthly range 5F.5 



Highest mean daily 75.6, loth 



Lowest mean daily 56.1, 2Sth 



Mean maximum 80. 



Mean minimum 55' 



Mean daily range 24.6 



Greatest daily range 39.0, 29th 



Least daily range 5.5, 6th 



Humidity. 



Mean dew point 60.5 



Mean force of vapor 639 



Mean relative humidity 84.3 



Precipitation. In inches. 



Total precipitation, in inches 1.93 



Number of days on which .01 inch or more 

 rain fell 7 



Wind. 



Total movement 227o.m 



Greatest daily movement 231m, 27th 



Least daily movement 24m, 4th, 5th, 



Mean daily movement 73m 



Mean hourly velocity 3.0m 



Maximum pressure per square foot, 6.5 lbs = 



36)n per hour, iTth, ii'., N.W. 

 Maximum velocity for ; minutes, i8m per 



hour, nth, i P., N.W. 

 Prevailing direction. West Southwest. 

 Summary. 



South 23 per cent 



North 13 " " 



South Southwest '3 " " 



West 13 " " 



Southwest ID " " 



Other directions 28 " " 



Weather. 



Mean cloudiness observed .... 37 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . , 149 hours = 35 per cent 



Number of clear days 14 



Number of fair days 12 



Number of cloudy days 5 



Briiibt Sunsliine. 



Number hours recorded, 2S0 = 65 per cent. 

 Rain, ist, 4th, 5th, 7th, 9th, loth. 13th, 14th, 

 19th, 2ist, 26th, 



Thunder and Liiihtnin^. 7th, 9th, , loth 

 19th. 



Gales. .■i6 m. nth. N.W. 



