'-'8«*RV0r THE 



BULLETIN No. 454. 



OCTOBER 1926 



Meteorolooical Observations 



MASSACHUSETTS 



AGIUCULTUKAL EXPElliMENT 



STATION. 



Latitude, 4^° 23' 48.5" N. Longitude 72* 31' 10" \V. 



flei'^ht of ha IOmeter above ground, ^i ft. Above sea level, 2jj.j ft. 

 Height oj Wind Instruments 72 ft. Time used, y^th A/er. 



MONTHLY SUMMARY. 



Pressuie. In inches 



Maximum reduced to freezing 

 Minimum reduced to freezing 

 Reduced maximum reading, 

 Reduced minimum reJtding, 



30.17, ISt.QA. 

 ,28.71,25th, II A. 



30.47, ISt, 9 A 

 29 00, 25th, II A. 



Mean semi-daily reduced 29.939 



Monthly range 1.4 



Air Temperature. 



In Degrees Fahr. 



Highest 81.0, 5th, 2-30 p. 



Lowest 24 o,22d, 6-30 A. 28th, 7-30 A. 



Mean hourly 48.0 



Mean of means of max. and min 47.8 



Mean sensible (wet bulb) 43.6 



Monthly range 57 o 



Highest mean daily 70-7. 5th 



Lowest mean daily 34 3. 20th 



Mean maximum 59 8 



Mean minimum 35 9 



Mean daily range 23.8 



Greatest daily range 390, 12th 



Least daily range 6.0, 20th 



Humidify. 



Mean dew point 40.1 



Mean force of vapor 333 



Mean relative humidity 84.2 



Precipifaiion. In inches. 



Total precipitation, in inches 5.02 



Total snow, in inches Trace 



Number of days on which .01 inch or more 

 rain fell 10 



Wiud. 



Total movement 35i8ni 



Greatest daily movement 2S6m, 25th 



Least daily movement 32m, 20th 



Mean daily movement 113.5m 



Mean hourly velocity 4.7m 



Maximum pressure per squarefoot. 9.0 lbs = 



42m per hour, 25th, 12 m., S.W. 

 Maximum velocity for 5 minutes, 32m per 



hour, 25th, 12 Af., S.W. 

 Prevailing direction, West Southwest 



Summary. 



South 22 per cent. 



West 16 " " 



Northwest '3 " " 



Soutn Southwest 10 " " 



Southwest 10 " " 



North Northwest 10 " " 



Other directions 19 " " 



Weather. 



Mean cloudiness observed .... 54 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 205 hours = 60 per cent 



Number of clear days 2 



Number of fair days 15 



Number of cloudy days 14 



Bright Sunnhine. 

 Number hours recorded. 136 =■ 40 per cent. 



Rain. 2d, 4th, 5th, 7th, loth, 13th, 17th, iSth, 



I9th, 20th, 24th, 25th, 30th, 31st. 

 Snow, iSth, 20th. 



Frosts, 9th. 10th, i2th, i6th, 22d, 27th, 28th. 



Gales, 42m, 25th, S. W. 



