BULLETIN No. 404. 



AUGUST, 1922 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGIUCULTUIUL EXrEUlMENT 



STATION. 



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



Hei_s;ht of barometer above ground, J/./"/. Above sea level, 2jj.^ fi. 

 Height oj Wind Instruments J 2 ft. Time used, 'j'jihMer. 



MONTHLY SUMMARY. 



Pressiiie. In inches. 



Wind. 



Maximum reduced to freezing, 30.04, i2th, 8 A Total movement 3007 m 



Minimum reduced to freezing, 29.34 7th, 7 p Greatest daily movement 24Sm, 25tli 



Reduced maximum reading 30.33, i2lh, 8 a Least daily movement 33m, 31st 



Reduced minimum reading, 29.63, 7th, 7P Mean daily movement 97m 



Mean semi-daily reduced 29.986' Mean hourly velocity 4m 



Monthly range 0.70 



Maximum pressure per square foot, 5.5 lbs = 

 33m per hour, 25th, 10 p, S.S.W. 



Maximum velocity for 5 minutes, 20 ni per 

 hour, 25th, 9 p., S.S.W. 



Prevailing direction. Southwest. 



Air Temperature. In Degrees Fahr. 



Highest go.5, 17th, 2:30 p Summary. 



Lowest 40.0, 22d, ^130 A 



Mean hourly 67.3 S°"tli Southwest 23 per cent 



Mean of means of max. and min 6S.2r°"*-^ '^ 



Southwest 13 



Nortli Northeast 13 



North 10 



Mean sensible (wet bulb) 62.3 



Monthly range 46.5 



Highest mean daily 76.7, 16th 



Lowest mean daily 60.0, 21st 



Mean maximum 79.1 



Mean minimum 57.2 



Mean daily range 21.9 



Greatest daily range 37.5, 22d 



Least daily range 9.0, 24th, 25th 



Hnmidity. 



Mean dew point 59.8 



Mean force of vapor 646 



Mean relative humidity 81.6 



Precipitation. In inches. 



Total precipitation, in inches 4.25 



Number of days on which .01 incli or more 

 rain fell 13 



•Temperature in ground shelter. 

 ••Reduced to freezing and sea-level. 



Northeast 10 " " 



Other directions i5 " " 



Weather. 



Mean cloudiness observed .... 58 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 173 hours = 40 per cent. 



Number of clear days 6 



Number of fair days 16 



Number of cloudy days 9 



Briiiht Sunshine. 



Number hours recorded, 256 = 60 per cent. 

 Rain, ist, 2d, 4th, 7th, 8th, 12th, 17th, iSth, 



19th, 24th, 25th, 26th, 27th, 2Sth, 29th. 

 Thunder and Liahtninii. iSt, 6th, 7th, 17th, 



uStli, 19th, 24th, 26th. 



Gales, none. 



