BULLETIN No. 303. 



MARCH, 1914 



Meteorological Observations 



AT THE 



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'jj.^ ft. 

 Height of Wind Instruments J 2 ft. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, 3o.26,2;th, 9 A. 

 Minimum reduced to freezing, 2S.17, 1st, S p. 

 Reducedt maximum reading, 30.57, 25th, 9 A. 

 Reducedt minimum reading, 28.47, ist, 8 P. 



Mean semi-daily reduced, 29.997 



Monthly range 2.10 



*Air Temperature. In Degrees Fahr. 



Highest, . . . , 69.0, 27th, 3 p. 



Lowest, 8.5,21st, 5:30A. 



Mean hourly, 32.7 



Mean of means of max. and min 33.7 



Mean sensible (wet bulb), 29.6 



Monthly range, 60.5 



Highest mean daily, 53.9, 27th 



Lowest mean daily 18.8, 20th 



Mean maximum, 4'-9 



Mean minimum, 25.5 



Mean daily range, . 16.4 



Greatest daily range, 26.5, i6th, 25th 



Least daily range, 4-o. 6th 



Humidity. 



Mean dew point 24.8 



Mean force of vapor 185 



Mean relative humidity, 76.4 



Precipitation. In inches. 



Total precipitation, 5.52 



Number of days on which .01 inch or more 



rain fell 11 



Total snow in inches 6.25 



*remperature in ground shelter. 



1 Reduced to freezing and sea-level. 



Wind. 



Total movement, 5663m. 



Greatest daily movement, .... 438m., 19th 



Least daily movement, 44m., 22d 



Mean daily movement 183 m 



Mean hourly velocity, 7.6 m 



Maximum pressure per square foot, 30.0 lbs.= 



77m. per hour, ist, 6p., E. 

 Maximum velocity for 5 minutes, 45m. per 



hour, ist, 6p., E. 

 Prevailing Direction, Northwest. 



Summary. 



North Northwest 16 per cent 



West Northwest 13 " 



North 13 " 



North Northeast 10 " 



Southwest 10 " 



Other directions 38 " 



Weather. 



Mean cloudiness observed, .... 53 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 201 hrs.=54 per cent. 



Number of clear days, 4 



Number of fair days, 15 



Number of cloudy days, 12 



Bright Sunshine. 



Number of hours recorded, . . 170 hrs=46)(. 



Rain, ist, 2d, 3d, 4th, 6th, 7th, Sth, 17th, 18th, 



26th, 27th, 2Sth, 29th, 30th. 



Snow, ist, 2d, 4th, 6th, 7th, 9th, iSth, 22d,23d, 



28th, 29th. 



Hail, i8th, 2Sth. 



Gales, 35 or more miles per hour : 77ni, ist, 



E.; 37m, 3d, N.N.W.; 52m, 19th, W.N. W. 



