BULLETIN No. 37 1. 



NOVEMBER, 1919 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, 31 ft. Above sea level, 2yj.^ fi. 

 Height oj Wind Instruments Y2 ft. Time used, y^t/iMer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 

 Maximum reduced to freezing, 30.21, loth, 7 A 

 Minimum reduced to freezing, 29.08, 30th, 5 a 

 Reduced maximum reading . 30.53, loth, 7 A 

 Reduced minimum reading, 29.37, 30th, 5 A 



Mean semi-daily reduced 30.0S4 



Monthly range 1.16 



*Air Temperature. In Degrees Fahr 



Highest 70-0, Jst, i p 



Lowest 17-0, 2ist, 7 A 



Mean hourly 39-6 



Mean of means of max. and min 40.1 



Mean sensible (wet bulb) 35.6 



Monthly range 53-o 



Highest mean daily 61.7.1st 



Lowest mean daily 26.4, 20th 



Mean maximum 48. 5 



Mean minimum 31 -6 



Mean daily range 16.9 



Greatest daily range 35.0, loth 



Least daily range 7-5i 26th 



Humidity. 



Mean dew point 31.5 



Mean force of vapor 237 



Mean relative humidity 79.1 



Precipitation. In inches. 



Total precipitation, in inches 6.20 



Total snow, in inches Trace 



Number of days on which .01 inch or more 

 rain fell 10! 



•Temperature in ground shelter. 

 ••Reduced to freezing and sea-level. 



Wind. 



Totalfmovement 5207 m 



Greatest daily movement 436m, 6th 



Least daily movement .... 27m, 29tii 



Mean daily movement i74ni 



Mean hourly velocity 7.2 m 



Maximum pressure per sciuare foot, 8.0 lbs 



40m per hour, 30th, 8a, S.S.W. 

 Maximum velocity for 5 minutes, 30m per 



hour,'3oth, 3A, S.S.W. 

 Prevailing direction. West. 



Summary. 



South I3jper cent 



North 13 " " 



South Southwest 13 



North Northeast 10 



West 10 



West Northwest 10 



Other directions 31 



Weather. 



Mean cloudiness observed .... 53 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 170 hours = 58 per cent. 



Number of clear days 6 



Number of fair days 9 



Number of cloudy days 15 



Brifiht Sunshine. 



Number hours recorded, 123 hrs,= 42 per cent. 

 Rain.ad, ist, 2d, 5th. nth, i2tli, 13th, 19th, 



22d, 26th, 27th, 29th, 30th. 

 Snow. 5th, 19th. 



Gales. 35 miles or more per liour: 35ni, 

 20th, N.W.; 40m, 30th, W.S.W. 



