BULLETIN No. 365. 



JUNE, 1919 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGIIICULTUIUL EXPERIMENT 



STATION. 



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



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

 Height oj Wind Instruments y 2 ft. Time used, y^thMer. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Maximum reduced to freezing,3o.22, 12th, S A 

 Minimum reduced to freezing, 29.^0, 27th, 2 p 

 Reduced maximum reading . . 3o.5i,i2tli, 8 A 

 Reduced minimum reading, 29.78, 27th, 2 p 



Mean semi-daily reduced 30-127 



Monthly range 0.73 



*Air Temperatnre. In Degrees Fahr 



Highest loi.o, 3d, 4 p 



Lowest 41-5, 23d, 4 A 



Mean hourly 68.4 



Mean of means of max. and min 68.3 



Mean sensible (wet bulb) 61.8 



Monthly range . 59-5 



Highest mean daily 7S.Q, 3d,4th 



Lowest mean daily 52.8, 9th 



Mean maximum 81.8 



Mean minimum 55.2 



Mean daily range 26.2 



Greatest daily range 43.5,13th 



Least daily range 5.5, 8th 



Hamidity. 



Mean dew point 58.1 



Mean force of vapor 68. 



Mean relative humidity 73.9 



Precipitation. In inches. 



Total precipitation, in inches 1.09 



Total snow, in inches 



Number of days on which .01 inch or more 



rain fell 6 



•Temperature in ground shelter. 

 "Reduced to freezing and sea-level. 



Wind, 



Total movement 3456 m 



Greatest daily movement 264m, 28th 



Least daily movement 36m, 10th 



Mean daily movement 115m 



Mean hourly velocity 4.8 m 



Maximum pressure per square foot, 4.5 lbs 



30m per hour, 26th, 3P, S.S.W. 

 Maximum velocity for 5 minutes, i8m per 



hour, 26th, 3P, S.S.W. 

 Prevailing direction. South. 



Summary. 



South 20 per cent 



South Sf)uthwest 20 " " 



Southwest 10 •' " 



South Southeast 10 " " 



Other directions 40 " " 



Weather. 



Mean cloudiness observed .... 43 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 131 hours = 29 per cent. 



Number of clear days 14 



Number of fair days 12 



Number of cloudy days 4 



Briiiht Sunshine. 



Number hours recorded, 326 hrs,= 71 per cent. 

 Kain,, 6th, 8th, 9th, 15th, 20th, 26th, 27th. 

 Gales, 35 miles or more per hour : None. 



