BULLETIN No. 311. 



NOVEMBER. 1914 



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 fl- Above sea level, 2yj.^ ft. 

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maxunuin reduced to freezing, 30 47, 29th, lOA. 

 Minimum reduced to freezing, 29.1;, 20th, i p. 

 Reduced! maximum reading, 30. 78, 29th, 10 A. 

 Keducedt minimum reading, 29.46, 20th, i p. 



Mean semi-daily reduced, 30.066 



Montiily range, 1.32 



*Air Temperature. In Degrees Falir. 



Highest, 71.;, ist, 2:30 p. 



Lowest, 4.5, 24th, 6 a. 



Mean hourly, 37.0 



Mean of means of max. and min 37.6 



Mean sensible (wet bulb), 31.5 



Monthly range, 67.0 



Highest mean daily 5'-6. 4th 



Lowest mean daily, 21.0, 23d 



Mean maximum, 47.5 



Mean minimum, 27.6 



Mean daily range, I9-? 



Greatest daily range, 37.Si ist 



Least daily range, . 8.5, 19th 



Humidity. 



Mean dew point, 25.7 



Mean force of vapor, 215 



Mean relative humidity, ........ 6g.6 



Precipitation. In inches. 



Total precipitation, 2.62 



Number of days on which .01 inch or more 

 rain fell 7 



Wind. 



Total movement, 528oni. 



Greatest daily movement, .... 378m., 17th 



Least daily movement iSm., 30th 



Mean daily movement, I76.m 



Mean hourly velocity, J-Z^f^ 



Maximum pressure per square foot, 18.5 lbs.= 



6im. per hour, 13th, 3 P., S.S.W. 

 Maximum velocity for 5 minutes, 40m. per 



hour, 13th, 2 P., S.S.W. 

 Prevailing Direction, West Southwest. 



Summary. 



West 23 per cent. 



West Southwest 13 " 



South 10 " 



South Souths. est 10 " 



Southwest 10 " 



Northwest 10 " 



Other directions 24 " 



Weatlier. 



Mean cloudiness observed, .... 41 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 180 hrs.=62 per cent. 



Number of clear days, 3 



Number of fair days, 10 



Number of cloudy days, 17 



Briglit Sungliine. 



Number of hours recorded, . . 113 hrs=38^. 

 Rain, 2d, 3d, 5th, 7th, 8th, 13th, 15th, i6th, 



19th. 

 Snow, nth, 17th,. 19th, 20th, 23d 

 Gales, 35 or more miles per hour : 45111, 2d, 

 W.N.W.; 44m, 4th, W.S.W.; 35m, 5th, 

 W. N. W.; 6im, 13th, S.S.W.; 37th, 14th, W.; 



Total snow in inches SlUim, i5th,E.S.E.; 59m,i7th,W.; 41m, 19th, N. 



•Temperature in ground shelter. 

 1 Reduced to freezing and sea-level. 



