AMrtcKST, MASS, 



BULLETIN No. 42 1. 



JANUARY, 1924 



Meteorolooical Observations 



o 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, 31 ft. Above sea level, 2yj.j ft. 

 Height oj Wind Instruments ^2 ft. Time used, y^th Mer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing, 30.44, 2d ().\. 

 Minimum reduced to freezing, 29.03, nth. 2 p 

 Reduced maximum reading, 30.77, 2d qa. 



Reduced minimum reading, 29.33, nth, 2P 



Mean semi-daily reduced 30-i35 



Monthly range 1.44 



Air Temperature. In Degrees Fahr. 



Highest 54.0,11th, II A. 



Lowest -8.0, 27th, 6 a.; 28th, 6 a. 



Mean hourly 26.2 



Mean of means of max. and min 25. S 



Mean sensible (wet bulb) 23.1 



Monthly range 62.0 



Highest mean daily 47.0,11th 



Lowest mean daily -0.3, 27th 



Mean maximum 35.1 



Mean minimum 16.5 



Mean daily range 1S.6 



Greatest daily range 35.0, 28th 



Least daily range 10.5, i3ih 



Homidity. 



Mean dew point 18.8 



Mean force of vapor 148 



Mean relative humidity 79.9' 



Precipitation. In inches. 



Total precipitation, in inches 3.85 



Total snow, in inches 10 



Number of days on which .01 inch or more 



rain fell 11 



Days of sleighing 15 



Wind. 



Total movement 6163m 



Greatest daily movement 462m, 26th 



Least daily movement 71 m, loth 



Mean daily movement i9gm 



Mean hourly velocity 8.3m 



Maximum pressure per square foot, 22.=; lbs== 



67m per hour, nth, 10 a., S.S.E. 

 Maximum velocity for q minutes, 38m per 



hour, 2ist, 5 P., N.'W. 

 Prevailing direction. West. 



Summary. 



Northwest 23 per cent 



South Southwest 13" " 



North 10 " " 



South 10 " " 



Southwest 10 " " 



West 10 " " 



Other directions 24 " " 



Weather. 



Mean cloudiness observed .... 49 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . ,119 hours = 40 per cent. 



Number of clear days 9 



Number of fair days 15 



Number of cloudy days 7 



Bright Sunshine. 



Number hours recorded, 175 = 60 per cent. 

 Rain, ist, 2d, 3d, loth, nth, i6th, 19th, 30th. 

 Snow . . 2d, 5th, 2ist, 24th, 25th. 

 Gales. 35 m. per hour : 58 m., ist, N. W,; 

 48. m 3d, N. \V.: 36.m, 4th, N. W.; 40 m. 7th, 

 N. \V.;67 m. nth, S. S. E.; 40 m. 17th, N- W.; 

 63 m. 2ist. N. W. 45 ni. 23d, W. N. W.: 35 m. 

 25th, N; 56 m. 36th, N. W.; 36 m. 27th, W. 

 N. W. 



