BULLETIN No. 299. 



NOVEMBER, 1913 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, ^r ft. Above sea level, 2yj.j ft. 

 Height of Wind histruments 72 ft. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maxunuiu reduced to freezing, 30 4i,2Sth,ii A. 

 Minimum reduced to freezing, 28.78, gth, 5 p. 

 Keducedt maximum reading, 30.72, 28th, 11 a. 

 Reducedt minimum reading, 29.07, gth, 5 p. 



Mean semi-daily reduced, 30.129 



Montiily range, 1.65 



•Air Temperature. In Degrees Fahr. 



Higliest, 68.0, 20th, 12 m. 



Lowest, 23.0, ist,5:30A; 27th,7:30A; 28th,4:30A. 



Mean hourly, 41.6 



Mean of means of max. and min 41.8 



Mean sensible (wet bulb), 36 6 



Monthly range 45.0 



Highest mean daily, 58.5, gth 



Lowest mean daily, 2S.5,2Sth 



Mean maximum, 50.7 



Mean minimum, 32-9 



Mean daily range, i7-8 



Greatest daily range, 40.5, 6th 



Least daily range, 3-5. i6th 



Humidity. 



Mean dew point, 32.1 



Mean force of vapor, 259 



Mean relative humidity, 74.0 



Precipitation. In inches. 



Total precipitation, 2. 11 



Number of days on which .01 inch or more 



rain fell, * 9 



Total snow in inches 2.5 



♦Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement, 5003m. 



Greatest daily movement, .... 497ni., loth 



Least daily movement 37m., 6th 



Mean daily movement, 167 m 



Mean hourly velocity, 7.0 m. 



Maximum pressure per square foot, 14.5 Ibs.^ 



54ni. per hour, 23d, if., N.W. 

 Maximum velocity for 5 minutes, 3gm. per 



hour, gth, 5P., S.E. 

 Prevailing Direction, Northwest. 



Summary. 



North 13 per cent. 



North Northwest 13 " " 



Northwest 17" " 



West Northwest 10 " " 



South Southwest 10 " " 



Other directions 37 " " 



Weather. 



Mean cloudiness observed, .... 53 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, i8ohrs.=6i per cent. 



Number of clear days, 4 



Number of fair days, 10 



Number of cloudy days, 16 



Briglit Sunsliine. 



Number of hours recorded, . . 113 hrs=39!(. 



Rain, 3d. 4th, 8th, gth, 13th, 



14th, igth, 20th, 24th, 28th, 2gth. 



Snow, i6th, 28th, 29th. 



Hail, 



Frosts, 



Tliunder and Lightning, 



Gales, 35 or more miles per hour : 38m, ist, 



W; 43ni, 4th, N.W.; 53m, ght, S.E.; 41m, loth, 



S.S.W.; 54m, 23d, N.W. 



