BULLETIN No. 398. 



FEBRUARY. 1922 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGKICULTUIUL EXPEllIMENT 



STATION. 



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



Height of Ihiro meter above g rounds ^T ft. Above sea level, 273-5 A- 

 Height oj Wind histruments 72 ft. Time used, y^t/i Mer. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Maxinuim reduced to freezing, 30.29, 21st, 9 A 

 Minimum reduced to freezing, 29.05, 2nd, 4 p 

 Reduced maximum reading 30.60, 21st, 9 .\ 

 Reduced minimum reading, 29.35, 2nd, 4 P 



Mean semi-daily reduced 30.123 



Monthly range 1.2; 



Air Temperature. In Degrees Fahr. 



Highest 49.5,2nd, 4P 



Lowest — 13.5, iSth, 7:30 A 



Mean hourly 25.7 



Mean of means of max. and min .^5.8 



Mean sensible (wet bulb) 23.7 



Monthly range 63.0 



Highest mean daily 39 3. 2nd 



Lowest mean daily — 0.8, 17th 



Mean maximum 34.0 



Mean minimum 17.6 



Mean daily range 16.4 



Greatest daily range 43.0 iSth 



Least daily range 4.5, 22nd 



Hamidity. 



Mean dew point 19.9 



Mean force of vapor 149 



Mean relative humidity So. 5 



Mind. 



Total movement 3909 m 



Greatest daily movement 357ni, 8th 



Least daily movement . . . 14m, 22nd, 25th 



Mean daily movement 140m 



Mean hourly velocity 5.8m 



Maximum pressure per square foot, 11.5 lbs = 



48m per hour, 6th, 9 p, W.N.W. 

 Maximum velocity for 5 minutes, 30 m per 



hour, 6th, 9 p., W.N.W. 



Prevailing direction. West. 



Summary. 



North II per cent 



South Southwest 18 " " 



Southwest 14 " " 



West Northwest 18 " " 



North Northwest - . . 11 " " 



Other directions 28 " " 



Weather. 



Mean cloudiness observed .... 54 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 149 hours = 50 per cent. 



Number of clear days 7 



Number of fair days 10 



Number of cloudy days 11 



Preripitation. In inches. 



Total precipitation, in inches 3.02 



Number of days on which .01 inch or more 



rain fell 11 



Total .Snow in inches 13.^ 



Days of sleighing 17 



•Temperature in ground shelter. 

 "Reduced to freezing and sea-level. 



Bright Sunshine. 



Number hours recorded, 147, = 50 per cent. 



Kain, ist, 2nd, 6th, nth. 22d, 23rd. 



Snow, 2d, 3d. 6th, 9th, I2th, 13th, 15th, I9tll, 



22d, 27th. 

 Gales.4om, 3d, W.N.W.; 4Sm, 6th, W.N.W. 



39m., 13th, W.N.W.: 41m., 16th, N. :35m., 



17th, N.: 45m., 24th, N. W.; 42m., 2Sth 



W.N.W. 



