BULLETIN No. 25 1. 



NOVEMBER, 1909 



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.j ft. 

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



jfreaaure. In inches. 



Maximum reduced to freezing, 30 43, 7th, 9 A 

 Minimum reduced to freezing, 29.20, 17th, i f. 

 Reduced! maximum reading, 30.74, ytli, 9 A 



loth, S A. 

 Keducedt minimum reading, . 29.50, 17th, i p. 



Mean semi-daily reduced, 30.160 



Montiily range 1.24 



* All' Tetnperature. In Degrees Fahr. 



Highest, 72.0, 12th, 3:30 P 



Lowest, iS.5,ioth, 7A 



Mean hourly, 4i-3 



Mean of means of max. and min 42.0 



Mean sensible (wet bulb), 37.1 



Monthly range, 53.5 



Highest mean daily, 54-2, 13th 



Lowest mean daily, 28.2, 30th 



Mean maximum, 52.1 



Mean minimum, 3i-9 



Mean daily range, 20.2 



Greatest daily range 39.0, 12th 



Least daily range, 8.5, 24th, 25th 



H atnidity . 



Mean dew point, 32-6 



Mean force of vapor, 2sS 



Mean relative humidity, 77.2 



Precipitation. In inches. 



Total precipitation, 1.06 



Number of days on which .01 inch or more 



ram or melted snow fell • 8 



Total snow in inches 2.5 



Wind. 



Total movement, 5793ni. 



Greatest daily movenient, . . . .426m., 24th. 



Least daily movement, 19m., 28th. 



Mean daily movement 193m. 



Mean hourly velocity, 8.0 m. 



Maximum pressure per square foot, 13.0 lbs.= 



51m. per hour, 29th, 11 A., N.E. 

 Maximum velocity for 5 minutes, 36m. per 



hour 29th, II A., N.E. 

 Prevailing Direction, West Northwest. 

 Summary. 



Northeast 13 percent. 



South Southwest 13 " 



West Southwest 13 " 



West Northwest 10 " 



North Northwest 10 " 



Other directions, 41 " 



Weather. 

 Mean cloudiness observed, . . . .56 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, i47hrs.=5o per cent. 



Number of clear days, 8 



Number of fair days, 11 



Number of cloudy days, 11 



Bright Sunthine. 

 Number of hours recorded, . . 146 hrs. = 5056 

 Rain, 2d, 3d, 5th, 8th, 14th, 15th, i6th, 17th, 



22d, 23d, 24th, 25th, 29th. 

 Snow, 5th, i6th, igth, 23d, 24th, 25th. 

 Thunder and Lightning:, 2d. 

 jftail, 23d, 24th. 

 Gales, 3; miles or more per hour; 39m. 



9th, N.N.E.; 37m, 23d, N.E.; 40m, 24th, 

 E.N.E.; 40m, 26th, N.E.; 51m, 29th, N.E. 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



