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 Wi?id Instruments 72 ft. 



BULLETIN No. 17 1. 



MARCH, 1903. 



MONTHLY SUMMARY. 



fvessnre. In inches. 

 .\laxiniuin reduced to freezing, 30.34, 3rd, 1 1 A. 

 Minimum reduced to freezing, 29.16,31st, 10 A- 

 Reducedt maximum reading, 30.6s, 3rd, 11 A 

 Reduced* minimum reading, 29.46, 31st, 10 a- 



Mean tri-daily reduced, 30.196 



Montiily range • 1.19 



* Air Teiitperatiire. In Degrees Falir. 



Highest, 76.0, 20th, 1 p. 



Lowest, 19-0, 2d, 7:3oa. 



Mean hourly, _ 42.6 



Mean of means of max. and min., .... 42.9 



Mean sensil^le (wet bulb), 39-3 



Monthly range 57-o 



Highest mean daily, 57.9, 20th 



Lowest mean daily 29.2, 2d 



Mean maximum, 52.3 



Mean minimum, 33.4 



Mean daily range, 1S.9 



Greatest daily range, 45.0, 14th 



Least daily range, 4.0,21st 



Uutnidity. 



Mean dew point, 34.6 



Mean force of vapor, 293 



Mean relative humidity, 76.4 



FrecipitittioH. In inclies. 



Total precipitation, 6.40 



Numter of da^'s on which .01 inch or more 



rain or melted snow fell 12 



Snow, total in inches, i-o 



Snow on ground at end of month, . . . none 



♦ Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement, 4169m. 



Greatest daily movement, . . . . 300m., 31st. 



I^east daily movement lom., 13th. 



Mean daily movement 134 m. 



Mean hourly velocity, 5.6 m. 



Maximum pressure per square foot, 8.0 lbs.= 



40 m. per liour, ist, i p., W. 

 Prevailing Direction,- West Northwest. 



Summary. 



North 13 per cent. 



North Northwest, )9 "' " 



West, Northwest, 10 " " 



South Southeast, 10 " " 



East Southeast, . . 10 " " 



Otlier directions, 38 " 



Weather. 



Mean cloudiness observed, .... 63 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 233 hrs.=63 per cent. 



Number of clear days, 8 



Number of fair days, 6 



Number of cloudy days, 17 



t 



Bright Sunshine. 



Numl^er of hours recorded, . . . 138 hrs.=37< 

 Ktiin, ;th, 7th, 8th, 9th, nth, 17th, 21st, 22d, 



23d, 24th, 2;th, 2Sth, 30th, 31st. 

 SnoH', 3rd, 5th, 25th, 28th. 

 Galea, 35 miles or more per hour, 40m. ist, 



W.; 39 m. 27th, W.S.W. 



