BULLETIN No. 222. 



JUNE, 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, 2YJ.^ ft. 

 Height of Wi/ui histrutnents ^2 ft. 



MONTHLY SUMMARY. 



Hreasiire. In inches. 



Miixunum reduced to freezing, 29.94, 23d, 9 A. 

 Minimum reduced to freezing, 29.21, 3d, 5 a. 

 Reducedt maximum reading, 30.22, 23d, 9 A. 

 Rediieedt minimum reading, . 29.51,3d, 5 A. 



Mean semi-daily reduced, 29.932 



Montlily range 0.71 



*Air Temperature. In Degrees Fahr. 



Higliest, 95.0, iSth, 3 p. 



Lowest, 3S.0, 1st, 3 A., 4tli, 5 A 



Mean hourly, 63.9 



Mean of means of max. and nun., .... 63.7 



Mean sensible (wet bulb), 5S.3 



Monthly range, 57-o 



Highest mean daily, 77.3, iSth 



Lowest mean daily 45.8, 2d 



Mean maximum, 75.9 



Mean minimum, 51.5 



Mean daily range 24.4 



Greatest daily range, 40.3, i6th 



Least daily range, 2.0, 2d 



Hiitnidity. 



Mean dew point, 55.0 



.Mean force of vapor 592 



Mean relative humidity, 76.9 



Precipitation. In inches. 



I'otal precipitation, 2.36 



Number of days on which .01 inch or more 

 rain or melted snow fell, 9 



* Temperature in ground shelter. 



t Reduced to freezing and sea-level. 



Wind. 



Total movement, 4223 ni. 



Greatest daily movement, 329 m. ,3d 



Least daily movement, ...... 56m., 22d 



Mean daily movement 141 ni. 



Mean hourly velocity, 5-9 ni. 



Maximum pressure per square foot, 6.0 lbs.= 



3S m. per hour, 3d, 3 p., N.N.W.; 27th, 



II A. W.N.W. 



Maximum velocity for 5 minutes, 30 m. per 

 hour 27th, I p., W. 



Prevailing Direction, South Southwest. 



Summary. 



South, 10 per cent. 



North northwest, 10 



South Southwest, 10 



West, 10 



South southeast 23 



Other directions, 37 



Weather. 



Mean cloudiness observed, . ■ . .50 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 24ohrs.=53 per cent. 



Number of clear days i 



Number of fair days 20 



Number of cloudy days, 9 



Bright Sunshine. 

 Number of hours recorded, . . 217 hrs.=47* 

 Rain,2A. 3d, 5th, 6th, 9th, loth, 14th, 19th, 



20th, 25th, 26th, 29th, 30th. 

 Qaleg, 35 miles or more per hour, 35 m. 3d, 



N.N.VV.; 35m. 27th, W.N.W. 

 Thunder and Lightning , 20th, 23d, 25th, 

 26th. 



