'■■i' '''^It'ilii, ( 



^^i-iberalArts. 



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, 2jj.^ ft. 

 Height of Wind Instruments J2 ft. 



BULLETIN No. 123. 



MARCH, 1899. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Maximum reduced to freezing, 30.18, 14th, 12 p. 

 Minimum reduced to freezing. 2S.64, 19th, 6 p. 

 Reducedt maximum reading, 30.49, 14th, 12 p. 

 Reducedt minimum reading, . 2S.95, 19th, 6 p. 



Mean tri-daily reduced, 29.942 



Monthly range, . . . . • 1.54 



*Air Tetnperatnre, In Degrees Fahr. 



Highest 52.0, i2th 



Lowest, lo.o, 2ist 



Mean hourly 30.6 



Mean of means of max. and min., .... 33.6 



Mean sensible (wet bulb), 29.3 



Monthly range 42.0 



Highest mean daily, 43.1,12th 



Lowest mean daily 21.2, 17th 



Mean maximum, 41.0 



Mean minimum, 26.2 



Mean daily range 14. S 



Greatest daily range, 35.0,27th 



Least daily range, 4.5,15th 



Humidity. 



Mean dew point, 25 



Mean force of vapor iSo 



Mean relative humidity, . . • .... 79.1 

 Precipitation. In inches. 



Total precipitation, . • 7.13 



Number of days on which .01 inch or more 



rain or melted snow fell, 14 



Snow total in inches, 27 



Snow on ground at end of month in inches, 3 



Wind. 

 Total movement 5275 m. 



Greatest daily movement, .... 438 m., 7th 



Least daily movement 22 m., 9th 



Mean daily movement 170 m. 



Maximum pressure per square foot. 22 lbs.= 

 66 m. per hour, on 7th, 12 m., N. E. 



Prevailing Direction, North-northwest. 

 Summary. 



North 34 per cent. 



Northwest. 34 " "' 



Northeast, 13 " " 



Other directions 19 " " 



Weather. 

 Mean cloudiness observed, ... 66 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 236 hrs. =64 per cent. 



Number of clear days, 7 



Number of fair days, 7 



Number of cloudy days, 17 



Bright Sunshine. 

 Number of hours recorded, ... 134 hrs. =36^4 



Rain. 4th. 5th, iith, 12th, 15th, i8th, 19th, 22d, 

 23d. 28th, 29th. 



Sleet, 4th, 15th, 19th. 



Snou\ 2d, 4th, 7tli, 9th, 15th, iSth, 19th, 22d, 



23d, 26th. 28th, 29th, 31st. 



No. days sleighing, 13. 



Thunder and lAyhtning, 12th, 19th. 



Gales, yj m. ist, N. W. ; 40 m., 5th, S. W. ; 

 39m.,6th,S.; 66 m., 7th, N.E.; 39 m. ,8th, 

 N. \V.: 35 m.. nth, S. ; 36 m.. 12th. S. S. 

 \V.: 40 m., 13th, N.W.; 36 m., 16th, N.W. ; 

 43 m.. 19th, N. ; 62 m., 20th. N.; 35 m., 

 2ist, N. W. ; 61 m., 29th, N.W,: 53 m., 

 30th, W. 



