--t^r!'rsre.e, 



BULLETIN No. 4 10. 



FEBRUARY, 1923 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGlllCULTUlUL EXPElilMENT 



STATION. 



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



Height of barometer aboTe ground, 5T ft. Above sea level, 2yj.j ft. 

 Height oj Wind Instnitnents 72 ft. Time used, f^th Mer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing, 30.32, 6th, gA 

 Minimum reduced to freezing, 29.25, 3d. ioa 

 Reduced ma.ximum reading 30.66 6th, 9A 



Reduced minimum reading, 29.56, 3d, loA 



Mean semi-daily reduced 30-ii7 



Mimthly range i.io 



Air Temperature. 



In Degrees Fahr. 



Highest 46.0, 27th, 4-30P 



Lowest -10.5, 19th, 5-30A 



Mean hourly 18.2 



Mean of means of max. and min 17.9 



Mean sensible (wet bulb) 13.7 



Monthly range 56.5 



Highest mean daily 34.6, 2d 



Lowest mean daily 3.8, i8th 



Mean maxinuim 29.2 



Mean minimum b.5 



Mean daily range 22.7 



Greatest daily range 43.0, Sth 



Least daily range 6.5, 2Sth 



Humidity. 



Mean dew point 7.7 



Mean force of vapor loi 



Mean relative humidity 73.2 



Precipitation. In inches. 



Total precipitation, in inches 1.81 



Total snow, in inches 125 



Number of days on which .01 inch or more 



rain fell 13 



Days of sleighing 28 



•Temperature in ground shelter. 

 ••Reduced to freezingand sea-leveL. 



M'ind. 



Total movement 40T3 m 



Greatest daily movement 327m, 15th 



Least daily movement 35m, 20th 



Mean daily movement 143m 



Mean hourly velocity 6.oni 



Maximum pressure per square foot, 14.5 lbs = 



54m per hour, 3d, 7P.,N.W. 

 Maximum velocity for 5 minutes, 33 m per 



hour, 3d, 7P., N.W. 

 Prevailing direction. Northwest. 



.Summary. 



North 14 per cent 



Northwest 18 " " 



West Northwest 21 " " 



West 14 " " 



Other directions ZZ ^^ " 



Weather. 



Mean cloudiness observt-d .... 43 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 163 hours = 55 per cent. 



Number of clear days 5 



Number of fair days 11 



Number of cloudy days 12 



Bright Sunshine. 



Number hours recorded, 133 = 45 per cent. 



Rain, ist, 2d, 3d, 13th. 



Snow, 6th, 10th, nth, 12th, 13th, 14th, 20th, 



22d, 23d, 24th, 25th, 26th, 27th, 28th. 

 Gales, 35 or more miles per hour, 54m, 3d, 



N.W.; 35m, 4th, W.N.W.; 43m, 14th, 



W.N.W.; 47m, 15th, W.N.W.; 44ni, i6th, 



N.W.; 3Sm,22d, W.N.W. 



