METEOROLOGICAL OBSERVATORY 



Hatch Experiment Station 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



Height of barometer above ground, 51 ft. Above sea level, ^73-5 fi- 

 Height of Wind Instruments 72 ft. 



BULLETIN No. 182. FEBRUARY, 1904. 



MONTHLY SUMMARY. 



fresanre. In inches. 

 Maximum reduced to freezing, 30.34, 21st, 7 A. 

 Minimum reduced to freezing, 29.00, ist, i p. 

 Reducedt maximum reading, 30.67, 21st, 8 A. 

 Keducedt minimum reading, 29.31, ist, i p. 



Mean semi-daily reduced 30. ii^ 



Monthly range 1.36 



*Air Temperature. In Degrees Fahr. 



Highest, 4^.0, 7th. II P. 



Lowest —8.0, loth, 7 a. 



Mean hourly, 17.7 



Mean of means of max. and min 17.3 



Mean sensible (wet bulb), 14.5 



Monthly range 56.0 



Highest mean daily, 36.5, 22d 



Lowest mean daily, 1.3, i6th 



Mean maximum, 27.8 



Mean minimum, 6.8 



Mean daily range 21.0 



Greatest daily range, 43.5, 21st 



Least daily range, 7.0, iQthi 



Uutnldity. 



Mean dew point, 9.5 



Mean force of vapor, 104 



Mean relative humidity, 77.7 



Precipitation. In inches. 



Total precipitation, 2.45 



Number of days on which -oi inch or more 



rain or melted snow fell, 11 



Snow, total in inches 10 



Snow on ground at end of month, . 8 inches 



• Temperature in ground shelter, 

 t Reduced to freezing and sea- level. 



^%Hnd. 



Total movement, 4910 ni. 



Greatest daily movement, .... 343m., 25th 



Least daily movement, . 6ni., 6th 



Mean daily movement 169m. 



Mean hourly velocity, 7.0m. 



Maximum pressure per square foot, 23.5 lbs.= 



69 m. per hour, 8th, 2 A., W.N.W. 

 Prevaihng Direction, West, Northwest. 

 Summary. 



Northwest, 31 per cent. 



North, Northwest, 17 " " 



West, 14 " " 



North, 10 " " 



Southwest, 10 " " 



Other directions, iS " " 



Weather. 

 Mean cloudiness observed, . . . . 42 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . ... 134 hrs.=44 per cent. 



Number of clear days, 16 



Number of fair days, 4 



Number of cloudy days, 9 



Jtright Sunthine. 

 Number of hours recorded, . . . 173 lirs. = 5611 

 Rain, 6th, 7th, 21st, 22d,28th. 

 Hail, 28th. 

 Sno^i;, ist, 5th, 6th. 12th, 14th, 15th, 19th, 23d. 



24th, 28th,, 29th. 

 6nJe», 35 miles or more per hour, 41m. ist, 

 W. ; 39m. 3d, N.W. ; 69m. Sth, W.N.W. ; 

 39m. 16th, W.N.W.; 46m. 22d, W. ; 40m. 

 25th, W.N.W. 

 Days of sleighing, 29 



