Massailmt^ttts Agricallarai Coiiefcfc, 



AiViHERST, MASS, 



BULLETIN No. 430. 



OCTOBER, 1924 



Meteorolooical Observations 



AT THK 



MASSACHUSETTS 



AGIIICULTUIUL EXPEKIMENT 



STATION. 



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



ffeii^ht of barometer above ground, ^i ft. Above sea level, 2jj.^ ft. 

 Height oj Wind Instnanents J2 ft. 2'ime used, j^thMer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing 30.29, 30th, S A 

 Minimum reduced to freezing, 29.40, ist. o a 

 Reduced maximum reading, 30.60, 30th, 8 A 

 Reduced minimum reading, 29.70, ist,0A 



Mean semi-daily reduced 30. 21: 



Monthly range o 90 



Air Temperature. In Degrees Fahr. 



Highest 7S.5, 6th, 1:30 p. 



Lowest 19 5, 31st, 7:30 A 



Mean hourly 49.J 



Mean of means of max. and min 51.3 



Mean sensible (wet bulb) 42.1 



Monthly range 59.0 



Highest mean daily 63.4, 6th 



Lowest mean daily 40.4, 22nd 



Mean maximum 66.4 



Mean minimum 36.3 



Mean daily range 30.1 



Greatest daily range 43.5, 23d, 24th 



Least daily range 14.0, Sth 



Hamidity. 



Mean dew point 37,6 



Mean force of vapor 330 



Mean relative humidity 72.9 



Precipitation. In inches. 



Total precipitation, in inches 01 



Number of days on which .01 inch or more 

 rain fell \ 



Wind. 



Total movement 3643ni 



Greatest daily movement 255m, 16th 



Least daily movement 36m, 27th 



Mean daily movement iiSm 



Mean hourly velocity 4.8m 



Maximum pressure per square foot, 7.5 lbs=" 



39m per hour, 20th, 2 P., N.W. 

 Maximum velocity for ; minutes, 21m per 



hour, 20th, I p., N.W. 

 Prevailing direction. West. 



Summary. 



North Northeast 22 per cent 



South Southwest 13 " " 



South 10 " " 



Soufhwest 10 " " 



Northwest 10 " " 



Other directions 35 " " 



Weather. 



Mean cloudiness observed .... 18 per cent 

 Total cloudiness recorded by the -Sun 



Thermometer . . u6 liours = 34 per cent. 



Number of clear days 11 



Number of fair days 17 



Number of cloudy days 3 



Bright Sunshine. 



Number hours recorded, 225 = 66 per cent. 



Rain. 7th, iSth. 



Frosts. 13th, 14th, ISth, 16th, iSth, 20th, 23d, 



24th, 27th, 30th, 31st. 

 Gales, 36m., J2th, N.N.E.; 36m., 17th, N.W.: 



36m., 19th, N.; 39m., 20th, N.W. 



