BULLETIN No. 323. 



NOVEMBER, 1915 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGKICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, 51 ft. Above sea level, ^73 -5 f^- 

 Height oj Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



Pressuie. In inches. 

 Maximum reduced to freezing, 30.16, iSth, 7 a. 

 Minimum reduced to freezing, 28.89, 19th, 8 p 

 Reducedt maximum reading, 30.48, iSth, 7 A 

 Reducedt minimum reading, 29.19, 19th, 8 p 



Mean semi-daily reduced 29.993 



Monthly range 1.29 



*Air Temperature. In Degrees Fahr. 



Highest 69 0, ist 



Lowest 20.0, i8th 



Mean hourly 39-9 



Mean of means of max. and min 40.S 



Mean sensible (wet bulb) 35.5 



Monthly range 49.0 



Highest mean daily 49.5, 12th 



Lowest mean daily 31.9, i8th 



Mean maximum 49.8 



Mean minimum 31. 



Mean daily range 18. 



Greatest daily range 34.0, 8th 



Least daily range 4.0, 5th 



Humidity. 



Mean dew point 30.7 



Mean force of vapor 241 



Mean relative humidity 74.7 



Precipitation. In inches. 



'I'otal ])recipitation 2.20 



Number of days on which .01 inch or more 



rain fell 9 



'J"otal snow in inches .... 0.5 



* 'J'emperature in ground shelter. 



t Reduced to freezing and sea-level. 



Wind. 



Total movement 5402 m 



Greatest daily movement 476m, i6th 



Least daily movement 6ni, 26th 



Mean daily movement 180 m 



Mean hourly velocity 7-5 ni 



Maximum pressure per square foot, 22.0 lbs = 



66 m per hour, 15th, 8 p, W.N.W. 

 Maximum velocity for 5 minutes, 48m per 



hour, 15th, 9 p, W.N.W. 

 Prevailing direction, West Northwest. 



Summary. 



North 17 per cent 



North Northeast 13 •' " 



Southwest 13 '■ " 



West 13 " " 



West Northwest 13 " " 



South 10 " " 



Northwest 10 " " 



Other directions 11 '• " 



Weather. 



Mean cloudiness observed .... 44 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . .175 hours = 60 per cent 



Number of clear days 3 



Number of fair days 13 



Number of cloudy days 14 



Bright Sunshine. 



Number hours recorded, 118 hrs, := 40 per cent. 

 Rain, 2d, 4th, 12th, 14th, 15th, 19th, 21st, 27th, 



29th. 

 Thunder and Lightning, 2d. 

 Snow, 17th, 23d. 

 Gales, 35 or more miles per hour: 56m, 2d, 



W. N. W.; 39m, 3d, N.W.; 44m, 9th,N.W.; 



37m, 10th, N.W.; 56m, 13th, W.N.W.; 66m, 



15th, W.N.W.: 51m, i6th, W.N.W.: 36m, 



20th, N.W. 



