BULLETIN No. 2 19. 



MARCH, 1907. 



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'/j.^ ft. 

 Height of Wind I?istruments 72 ft. 



MONTHLY SUMMARY. 



fresaare. In inches. 



Maxinuiin reduced to freezing, 30.27, ist, 9 A. 

 Miiiiniuui reduced to freezing, 28. 89, 20th, 3 a. 

 Reducedt maximum reading, 30.59, ist, 9 a. 

 Reducedt minimum reading, . 29.20, 20th 3 A. 



Mean semi-daily reduced, 3o.o79 



Montlily range 1.39 



*Air Temperature. In Degrees Fahr. 



Highest, >9.5,2gth, 4P. 



Lowest, 5-5. 1st, 7 a. 



Mean hourly, 35.2 



Mean of means of max. and min., .... 35.2 



Mean sensible (wet bulb), - 30.9 



Monthly range, 74-0 



Highest mean daily, 61.3,29th 



Lowest mean daily, 19.6, ist 



Mean maximum, 44.9 



Mean minimum, 25.4 



Mean daily range i9-5 



Greatest daily range, 34.0, 29th 



Least daily range, 6.5, 13th 



Hntuiditif. 



Mean dew point, 25.8 



Mean force of vapor, 211 



Mean relative humidity, 73.4 



Precipitation. In inches. 



Total precipitation 1.82 



Number of days on which .01 inch or more 



rain or melted snow fell 9 



Total snow in inches, 3 



SnovT on ground at end of month, none 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



M'tHrf. 



Total movement, 5718 ni. 



Greatest daily movement, . . . .523 m., 20th 



Least daily movement, 52m., 8th 



Mean daily movement 186 m. 



Mean hourly velocity, 7.8 m. 



Maximum pressure per square foot, 27.0 lbs. = 

 74 m. per hour, 2oth,3 a., W.N.W. 



Maximum velocity for 5 minutes, 44 m. per 

 hour 2oth, 3 A., W.N.W. 



Prevailing Direction, West. 



Summary. 



North, Northwest, 16 per cent. 



Northwest, 16 " " 



South southwest, 13 " " 



West northwest, 10 " " 



Otiier directions, 45 " " 



Wentlier. 



Mean cloudiness observed, . . . .44 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . i26hrs.=34 per cent. 



Number of clear days, 14 



Number of fair days, u 



Number of cloudy days, 6 



Jirigftt Sunshine. 



Number of hours recorded, . . 245 hrs. = 66f( 



Rain, 2d, 4th. 12th, 13th, 14th, 15th, 19th, 



20th, 23d, 24th, 27th. 28th. 

 Snow, 4th, Sth.ioth, 15th, 19th, 24th, 25th. 

 Unys Sleighing, 12. 

 Gules, 35 miles or more per hour, 43 m. 3d, 



N.W.; 40 m.6th,N.E. ; 36 m. 16th, W.N. 



W.; 74 m. 20th, W.N.W. 



Sleet, 12th. 19th, 24th. . 



