r 



METEOROLOGICAL OBSERVATORY 



OF THK 



llalch Experiment Station 



MASSACHUSETTS AGRICULTURAL COLLEGE. 



.A-lS/flll^IEI^ST. 



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



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

 Height of Wind Instrume?its 72 ft. 



BULLETIN No. 194. 



FEBRUARY, 1905. 



MONTHLY SUMMARY. 



treasure. In inches. 

 Maximum reduced to freezing. 30.30, 19th, S p 

 Minimum reduced to freezing, 29.03, 13th, 9 a. 

 Reducedt maximum reading, 30.62, iQth,8 P 

 Reduced+ minimum reading, 29.34, J3th, 9 A. 



Mean senii-daily reduced 30.119 



Monthly range 1.28 



*Air Temperature. In Degrees Fahr. 



Highest 4S.5, 2ist, 5 p. 



Lowest -ii.o, 4th, 7.30 A. 



Mean hourly, 177 



Mean of means of max. and min 17.6 



Mean sensible (wet bulb), 14.5 



Monthly range 59-5 



Highest mean daily, 30.3,24th 



Lowest mean daily, 4.2, 4th 



Mean maximum 28.2 



Mean minimum 6.9 



Mean daily range, 21.3 



Greatest daily range 34.5, 21st 



r^east daily range 5.5, 22d 



Hiimiditff. 



Mean dew point 9.2 



Mean force of vapor, 100 



Mean relative humidity 75.1 



Precipitation. In inches. 



Total precipitation, 1.70 



Number of days on which .01 inch or more 



rain or melted snow fell, 5 



Total snow in inches 11 



Snow on ground at end of month, 4 



* Temperature in ground shelter. 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement 4503 m. 



Greatest daily movement, .... 333 m., iSth 



Least daily movement 6 m., 12th 



Mean daily movement i6im. 



Mean hourly velocity, . 6.7ni. 



Maximum pressure per square foot, 18.0 lbs.= 



60 m. per hour, iSth, 12 m., W. 

 Prevailing Direction, West, Northwest. 



Summary. 



West, Northwest, 32 per cent. 



North, 14 " " 



North, Northwest, 11 " " 



West, II •' " 



Other directions 32 " " 



Weather. 



Mean cloudiness observed, .... 31 per cent. 



Total cloudiness recorded by the Sun U'her- 



mometer, . . . . 118 hrs. =40 per cent. 



Number of clear days, ja 



Number of fair days 6 



Number of cloudy days S 



Bright Sunshine. 



Number of hours recorded, . . . i78hrs. = 6o< 



Rain, 9th, loth. 13th. 



Sleet, 6th: 12th. 



Snow, 6th, 9th, 12th, 13th, 20th, 28th. 



Grtlea, 35 miles or more per hour, 36m. 7th. 

 N.W.: 41m. loth. W.; f^m. iSth. \V. : 30 

 m. 27th, W.N. W. 



Days of Sleighing, 28 



