MHssar.hiisetts Aericultural College 

 -•.:VJH£RST. MASS. 



BULLETIN No. 426. 



JUNE, 1924 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGllICULTUML EXPEllIMENT 



STATION. 



Latitude, 42° 23' 48.5" N. 



Longitude 72" 31' 10" W. 



fleij^hf of barometer above ground, 51 ft. Above sea level, 2jj.^ ft. 

 Height oj Wind Instrtiments "J 2 ft. I'inie used, y§th Mer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing 30.04, nth, 6 a. 

 Minimum reduced to freezing, 29.2S, 29th. 4 p. 

 Reduced maximum reading, 30.34, nth, 6 a. 

 Reduced minimum reading, 29.56, 29th, 4 p. 



Mean semi-daily reduced 29.928 



Monthly range 0.7S 



Air Temperature. In Degrees Fahr. 



Highest S7.0, 24th, I p. 



Lowest 39.5, ist, 4:30 A. 



Mean hourly 64.8 



Mean of means of max. and min 64.3 



Mean sensible (wet bulb) 58. 5 



Monthly range 47.5 



Highest mean daily 75. S, 24th, 29th 



Lowest mean daily 54.0, 8th 



Mean maximum 76.3 



Mean minimum 52.3 



Mean daily range 24.0 



Greatest daily range 36.0, 17th 



Least daily range 11.0,5th 



Humidity. « 



Mean dew point 54.7 



Mean force of vapor 604 



Mean relative humidity 73. 8 



Precipitation. In inches. 



Total precipitation, in inches 1.2S 



Number of days on which .01 inch or more 

 rain fell 9 



Wind. 



Total movement 3190m 



Greatest daily movement 239m, 29th 



Least daily movement sSm, 4th, 28th 



Mean daily movement io6m 



.Mean hourly velocity 4.4m 



Maximum pressure per square foot, 8.5 lbs = 



41m per hour, 29th, 5 p., S.W. 

 Maximum velocity for , minutes, 21m per 



hour, 2gth, 3 p., S.W. 

 Prevailing direction, Soutwest. 



Summary. 



South Southwest 27 per cent 



South 10 " 



West 13 " 



North Northwest 10 " 



North 10 " 



Other directions -!,■}, " 



Weather. 



Mean cloudiness observed .... 40 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 144 hours = 32 per cent. 



Number of clear days 11 



Number of fair days 15 



Number of cloudy days 4 



Bright Sunshine. 



Number hours recorded, 313 = 68 per cent. 

 Rain. 3d, 4th, 6th, 8th, gth, 13th, 14th, 2ist, 



25th, 27th, 29th. 

 Thunder and Lightninii. 3rd, 4th, 2;th, 



29th. 

 Gales. 35m., ist, W.: 41m., 29th, S.W. 



