iVassiiiiui.M 



..ftY OF THE 

 AuTiciiltural Celltfi^rv 



BULLETIN No. 428. 



AUGUST. 1924 



Meteorolooiccil Observations 



AT THK 



MASSACHUSETTS 



AGRICULTUIUL EXrElUMENT 



STATION. 



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



Heiti^ht of barometer above ground, jr ft. Above sea level, 2jj.^ ft. 

 Height oj Witiii Instntments y2 ft. 2'ime used, y^tliAIer. 



MONTHLY SUMMARY. 



Prossiiie. In inches. 



Maximum reduced to freezing 29.99, 3rd, 12 p. 

 Minimum reduced to freezing, 29.16, 26th. i p. 

 Reduced maximum reading, 30.28, 3rd, 12 p. 

 Reduced minimum reading, 29.45, 26th, i p. 



Mean semi-daily reduced 29.967 



Mimthly range 0.73 



Air Temperature. In Degrees Fahr. 



Highest 970, 7th, i p., 



Lowest 42 0, 19th, 6 A. 



Mean hourly 69.7 



Mean of means of max. and min 70.3 



Mean sensible (wet bulb) 62.7 



Monthly range 55.0 



Highest mean daily 7S.S, 7th 



Lowest mean daily 60.2, i8th 



Mean maximum 83.2 



Mean minimum 57.4 



Mean daily range 25.8 



Greatest daily range 39.0, 3rd 



Least daily range 8.0, 12th 



Humidity. 



Mean dew point 59.5 



Mean force of vapor 6S3 



Mean relative humidity 76 2 



Precipitation. In inches. 



Total precipitation, in inches 3.1 



Number of days on which .01 inch or more 

 rain fell 9 



Wind. 



Total movement 3282m 



Greatest daily movement 194m, 4th 



Least daily movement 43ni, 3rd 



Mean daily movement io6m 



Mean hourly velocity 4.4m 



Maximum pressure per square foot, 4.5 lbs = 



30m per hour, 7th, 2 p., S.W.; loth, 5P., N. 

 Maximum velocity for 5 minutes, 24m per 



hour, 10th, 5 P., N. 

 Prevailing direction. South, Southwest. 



Summary. 



.Southwest 23 per cent 



South 20 " " 



South Southwest 16 " " 



North Northeast 16 " " 



Other directions 25 " " 



Weather. 



Mean cloudiness observed .... 33 Per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 149 liours = 35 per cent. 



Number of clear days I3 



Number of fair days '2 



Numlier of cloudy days 6 



Bright Sunshine. 



Number hours recorded, 280 =65 percent. 

 Kain. 6th, 7th, loth, 12th, 17th, 20th, 23d, 



25th, 26th, 27th. 

 Thunder and Liiihtniua. Wh, 7th. 10th, 



17th, 20th, 27th. 

 Gales. None. 



