BULLETIN No. 434. 



FEBRUARY, 1925 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTUIUL EXPERIMENT 



STATION. 



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



Height of hiifoineter above ground, 51 ft. Aboi'e sea level, 2jj.j ft. 

 Height of Wind Instruments J 2 ft. Time used, "j^thMer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing, 30.12, 3rd, 8 a. 

 Minimum reduced to freezing, 28.91, 26th i p. 

 Reduced maximum reading, 30.44, 3rd, 8 p. 

 Reduced mininuim reading, 29.22, 26th, i p, 



Mean semi-daily reduced 30.058 



Monthly range 1.22 



Air Teiuperniure. 



In Degrees Fahr. 



Highest 57.0, 22d, 4.30 p. 



Lowest 4.0, 5th S-30 A. 



Mean hourly 31. S 



Mean of means of max. and min 32.1 



Mean sensible (wet bulb) 28.4 



Monthly range 53.0 



Highest mean daily 46.0, 22d 



Lowest mean daily , . . . 14.0, 27th 



Mean maximum 41. i 



Mean minimum 23.1 



Mean daily range 18.0 



Greatest daily range 35.0, 5th 



Least daily range 7.5, 27th 



Humidity. 



Mean dew jioint 25.2 



Mean force of vapor 17S 



Mean relative humidity 82. S 



Wind. 



Total movement 4281m 



Greatest daily movement 682m, 27th 



Least daily movement iSm, 8th 



Mean daily movement 'SSm 



Mean hourly velocity 6.3ni 



Maximum pressure per square foot. 14.0 lbs = 



53m per hour, 26th, 8 p., W.N.W. 



27th, I p., W.N.W. 

 Maximum velocity for 5 minutes, 36m per 



hour, 27th, I p., W.N.W. 

 Prevailing direction, W.S.W. 



Summary. 



.South 14 per cent 



.South Southwest 14" " 



West II " " 



North Northwest 11 " 



Other directions 50 " " 



Weather. 



Mean cloudiness observed .... 45 per cent 

 Total cloudiness recorded Ijy the Sun 



Thermometer . . 155 hours = 52 percent. 



Number of clear days 6 



Number of fair days u 



Number of cloudy days i( 



Precipitation. In inches. Brijiht Sunshine. 



Total precipitation, in inches 3.64' Number hours recorded, 141 =48 per cent. 



Total snow, in inches 3' itain, 2d, loth. nth, 12th, 15th, 17th, 23d, 26th. 



Number of days on which .01 inch or more I , ., ^.j^ 



rain fell . . . 

 Days of sleighin;j 



ri Gales. 53ni> 26th, W.N.W'.: 53m. 27th. 

 I W.N.W. 



