BULLETIN No. 254. 



FEBRUARY, 1910 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, 51 ft. Above sea level, 2^3.5 ft. 

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



Fressure. In inches. 



Maxiinuiu reduced to freezing, '30 46, 26th, 8 A. 

 Minimum reduced to freezing, 29,09, i2tli, i P. 

 Reducedt maximum reading, 30.80, 26th, 8 A. 

 Reducedt minimum reading, . 29.40, 12th, i p- 



Mean semi-daily reduced, 30-o69 



Monthly range i.40 



*Air Temperature. In Degrees Fahr. 



Highest, 53-5, 21st, 3 p. 



Lowest, —7-0, 26th, 7 A. 



Mean hourly, 23.9 



Mean of means of max. and min 23.6 



Mean sensible (wet bulb), 20.S 



Monthly range, 60.5 



Highest mean daily, 44.o,2Sth 



Lowest mean daily 2.2, 7th 



Mean maximum, 33-3 



Mean minimum, 13.9 



Mean daily range, «9-4 



Greatest daily range, 40.5, 26th 



Least daily range, 9-0i 28th 



Humidity. 



Mean dew point 16.9 



Mean force of vapor, i34 



Mean relative humidity, 81.3 



Precipitation. In inches. 



Total precipitation, 5-oS 



Number of days on which .01 inch or more 



rain or melted snow fell, -13 



Total snow in inches 18.5 



• Temperature in ground shelter, 

 t Keduced to freezing and sea-level. 



Wind. 



Total movement, 5834ni. 



Greatest daily movement, .... 376m., ist. 



Least daily movement 57m., 3d. 



Mean daily movement 208111. 



Mean hourly velocity, 8.7 m. 



Maximum pressure per square foot, 15.0 lbs.= 

 55m. per hour, 23d, 11 A., W.N.W. 



Maximum velocity for 5 minutes, 33m. per 

 hour 5th, 3 p., W.N.W. 



Prevailing Direction, Northwest. 

 Summary. 



Northwest 18 percent. 



North Northeast 14 " " 



South Southwest! 14 " " 



North II " " 



West Northwest 11 " " 



Other directions, 32 " " 



Weatlier. 



Mean cloudiness observed, . ■ . .57 per cent. 



Total cloudiness recorded by the Sun Ther- 

 mometer, . ... ii6hrs.=39 per cent. 



Number of clear days, 11 



Number of fair days, 11 



Number of cloudy days, 6 



Bright Sunshine. 



Number of hours recorded, . . 180 lirs. =6156 



Rain, gth, 17th, i8th, 20th, 27th, 28tli. 



Hail, 17th, i8th. 



Snow, 3d, 4th, gth, nth, 12th, 17th, iSth, 20th, 



22d, 23d. 



Days Sleighing, 28. 



Gales, 35 miles or more per hour; 4ini. 



ist, N.E.; 42m,4th, N.N.E.; 48m, 5th, N.W; 



4;m, 10th, N.W.: 53m, 23d, W.N.W. 



