

BULLETIN No. 470. 



FEBRUARY, 1928 



Meteorolomcal Observations 



MASSACHUSETTS 



AGllICULTUKAL EXPERIMENT 



STATION. 



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



H/'ig/it of barometer above ground, ^i ft. Above sea level, 2yj.j ft. 

 Height oj Wind Instruments J 2 ft. Time used, y^t/iMer. 



MONTHLY SUMMARY. 



Pressiiie. In inches. 



Maximum reduced to freezins, 3040., 6th,gA. 

 Minimum reduced to freezing, 29.02, 18th, 3P 

 Reduced maximum reading, 3o-73. 6thi, qa 

 Reduced minimum reading, 29.33, iSth, 3 P 



Mean semi-daily reduced 30.06! 



Montlily range i-40 



Air Tpiniieratiire. 



In Degrees l^'ahr. 



Highest 50-5. 4th, 3-30 P 



Lowest -3-5, 26th, 7 A 



Mean hourly 25.7 



Mean of means of max. and min 25.5 



Mean sensible (wet bulls) 22.4 



Mtmthly range 54 o 



liighest mean daily 4°. 4. 15th 



Lowest mean daily 9-6 26th 



Mean maximum 34.4 



Mean minimum 16 7 



Mean daily range 17.6 



Greatest daily range 31.0, 2Ld 



Least daily range 40- 9th 



Humidity. 



Mean dew point 17. i 



Mean force of vapor 139 



Mean relative humidity 77.2 



Precipitation. In inches. 



Total precipitation, in inches 2.90 



Number of days on which .01 incii or more 

 rain fell 10 



Total snciw in inches 

 Days of sleigliing 



SS 



Mind. 



Total movement s-^-m 



Greatest daily movement 34Sni, 20th 



Least daily movement 21m ist 



Mean daily movement ,35^ 



Mean hourly velocity 7 "ni 



Maximum pressure per square foot, 6.5 lbs = 



36m per hour, 2d. 3 P.W. 

 Maximum velocity for 5 minutes, 24m per 



hour, 2d, 3 P., W. 

 Prevailing direction. West Northwest. 



17 per cent 

 14 " 

 14 " 



.Summary. 



Northwest . . . " ' 



West 



South Southwest 



North 10 



Southwest 10 



Southwest ■ • 10 



West Northwest 10 



North Northwast 10 



()ther directions 15 



Weather. 



Mean cloudiness observed .... 49 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 136 hours = 44 per cent 

 Number of clear days 13 



Number of fair days 6 



Number of cloudy days 10 



Briiiht Sunshine. 



Number hours recorded. 176= 56 per cent. 

 Kain. 7th. Sth, gth, 14th, 15th, 16th, 17th, 23d 

 Snow, ist, 3d, 9th, nth, 17th, iSth, 23d, 27th, 

 29th. 



tialeK, 36m. 2nd W.; 36m, 5th, N.N.E.: 36m. 

 19th. N. W.: 35m, 20th W.N.W. 



