IX 



BULLETIN No. 464. 



AUGUST, 1927 



Meteorolooical ObseivaUQ]]s -^^^y or tiii- 



MASSACHUSETTS 



AGIIICULTUIUL EXrERIMENT 



STATION. 





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



Height of ha ro meter abcme ground, ^T ft. Above sea level, 2yj.^ ft. 

 Height oj Wind Instrutnents 72 ft. I'iine used, y ^th Mer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, s«.o7. 26th, 8 p. 

 Minimum reduced to freezing, 29.41, 24th, 12 m 

 Reduced maximum reading, 30.36, 26th, S p 

 Reduced minimum reading, 29.70, 24th, 12 M 



Mean semi-daily reduced 29 997 



Monthly range 0.66 



Air Temperntiire. 



In Degrees Fahr. 



Highest 82.5, ist, i p 



Lowest 44.C, 25th, 5-30 A. 



Mean hourly 64 6 



Mean of means of max. and min 64.9 



Mean sensible (wet bulb) 61.3 



Monthly range 38.5 



Highest mean daily 74-i. Sth 



Lowest mean daily 54-8, i8th 



Mean maximum 75.3 



Mean minimum 54-6 



Mean daily range 20 



Greatest daily range 33.0, 4th, 25th 



I,east daily range 8.0, i8th, 2jd 



Humidity. 



Mean dew point 60 7 



Mean force of vapor 5S7 



Mean relative humidity 87.3 



Precipitation. In inches. 



Total precipitation, in inches 3.01 



Number of days on which .01 inch or more 

 rain fell 14 



Wind. 



Total movement 2Si8ni 



Greatest daily movement I75ni, 27th 



Least daily movement 32m, 4th 



Mean daily movement gim 



.Mean hourly velocity 3.8m 



Maximum pressure per square foot, 5.olbs = 



32m per hour, 24th, i r. N. 

 .Maximum velocity for 5 misubes, 21m per 



hour, i6th, 9 a., N. 

 Prevailing direction, Southwest 



Summary. 



South 40 per cent 



Northwest 13 



North Northeast 13 



Southwest 10 



South Southwest 10 



Other directions 14 



Weather. 



Mean cloudiness observed .... 55 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 232 hours = 54 per cent 



Number of clear days 4 



Number of fair days 16 



Number of cloudy days 11 



Briiiht Sunshine. 



Number hours recorded, 197 =r 46 per cent. 

 Kain. 1st, 5th, Sth, gth, 12th, 13th, 14th, iSth, 

 2ist, 23d, 24th, 26th, 27th, 28th, 29th. 



Thunder and Liithtninii, ISt, 5th, Sth 

 I2th, 13th, 31st. 



Gales, None. 



