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BULLETIN No. 418. 



OCTOBER, 1923 



iMeteorological Observations 



AT THK 



MASSACHUSETTS 



AGRlCULTUiUL EXPEillMENT 



STATION. 



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



Fleight of Ihiro meter above ground, 31 ft. Above sea level, 2yj.^ ft. 

 Height oj Wind Instruments 12 ft. 2'ime used, j^tliMer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 

 Maximum reduced to freezing, 30.11, 2Sth Sa. 

 Minimum reduced to freezing, 29.29, 19th. 4 A. 

 Reduced maximum reading, 30.42, 28th Sa. 

 Reduced minimum reading, 29.58, r9th,4A 



Mean semi-daily reduced 30.100 



Montlily range 084 



Air Temperature. 



In Degrees Fahr. 



Highest 81.0, 14th, 3P 



Lowest 26 5, 28th, 6a 



Mean hourly 50.1 



Mean of means of max. and min 5i-i 



Mean sensible (wet bulb) 44 ; 



Monthly range 54.5 



Highest mean daily 65.0, r4th 



Lowest mean daily 39.5, 31st 



Mean maximum 63 9 



Mean minimum 38 3 



Mean daily range 25.6 



Greatest daily range 40.0, gth 



Least daily range 6.0, 23d 



Hnmidity. 



Mean dew point 41.3 



Mean force of vapor 33S 



Mean relative humidity Si. 5 



Precipitation. In inches. 



Total precipitation, in inches 5.!;o 



Number of days on which .01 inch or more 

 rain fell 6 



Wind. 



Total movement 3Soom 



Greatest daily movement 238m, igth 



Least daily movement zSm, nth 



Mean daily movement 123m 



Mean hourly velocity 5.1m 



Maximum pressure per square foot, 8.0 lbs = 



4om per hour, 30th, 6p., S. 

 Maximum velocity for 5 minutes, 30m per 



hour, 30th, i; p., S. 

 Prevailing direction. West, Northwest. 



Summary. 



North Northaest 16 per cent 



South 13 " " 



Southwest 13 " " 



West Southwest 13 " " 



North 10 " " 



Northwest 10 " " 



Other directions 25 " " 



Weather. 



Mean cloudiness observed .... 44 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 109 hours = 32 per cent. 



Number of clear days 12 



Number of fair days i^ 



Number of cloudy days 4 



Bright Sunshine. 



Number hours recorded, 232 = 68 per cent. 

 Rain, 4th, loth, 15th, iStli, 19th, 20th, 23d, 

 24th, 28th, 30th. 



Thunder and Li^htnin^, 3°th- 

 Frosts, 7th, Sth, gth, 21st, 27th, iSth, 31st. 

 Gales. 40m 30th, S. 



