METEOROLOGICAL OBSERVATORY 



OF THE 



Hatch Experiment Station 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



.a.Ivi::e3:er,sx. 



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



Height of barometer above ground, ^i ft. Above sea level, ^yj.^ ft. 

 Height of Wind Instruments 72 ft. 



MARCH, 1901 



BULLETIN No. 147. 



MONTHLY SUMMARY. 



yressure. In inches. 

 Muximum reduced to freezing, 30.11, 19th, 9 p. 

 Minimum reduced to'freezing, '28.95, 27th, 3 a. 

 Reducedt maximum reading, 30.43, 19th, 9 p- 

 Keducedt minimum reading, 29.26, 27th, 3 .\' 



Mean tn-daily reduced, 29.S95 



Monthly range ■ !■ 



*Air Temperature. In Degrees Fahr. 



Highest 56.5, 25th, 3 p. 



Lowest, —0-5, 7th, 6 a. 



Mean hourly, 33-i 



Mean of means of max. and min., .... 32.5 



Mean sensible (wet bulb) 30.8 



Monthly range 57-° 



Highest mean daily 43.9, 2;th 



Lowest mean daily, 9.7, 6th 



Mean maximum, 40.5 



Mean minimum, .... 24.5 



Mean daily range 16.0 



Greatest daily range, 29.5, 7th 



Least daily range, 3.5, 12th 



Huutidity. 



Mean dew point, 24.7 



Mean force of vapor 204 



Mean relative humidity, 70.8 



frecipiUition. In inches. 



Total precipitation, . • 5.66 



Number of days on which .01 incii or more 



rain or melted snow fell 12 



Snoiv, Total in inches, 6.5 



Snow on ground at end of month, o 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement, 5482m. 



Greatest daily movement, .... 378 m., 29th 



Least daily movement, 29 m., i6th 



Mean daily movement, 176.8 m. 



Mean hourly velocity, 7.4 m. 



Maximum pressure per square foot, 10.5 lbs.= 



46 m. per hour, 21st, 9:00 a., S.E. 

 Prevailing Direction, West, Northwest. 



Summary. 



West, Northwest, 10 per cent. 



Northwest, 19 " " 



Northeast, 13 " " 



North, . ■ 10 " " 



.South, 13 " " 



Other directions, 35 " " 



Weather. 

 Mean cloudiness observed, 68 .... per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 27Shrs.=75 percent. 



Number of clear days, 3 



Number of fair days, 7 



Number of cloudy days, 21 



Bright Sunshine. 

 Number of hours recorded, ... 93 hrs. = 25* 



.Bain, 2d, 4th, 8th, 9th, loth, nth, 20th, 21st, 

 24th, 25th, 26th. 



Snow, ist, 4th, 5th, 14th, i5tli, 16th, 27th, 

 28th. 



Galea, 35 miles or more per nour, 36m., 12th, 

 N.W.; 46 m., 2ist, S.E.; 36 m., 29th, N.W. 



