BULLETIN No 227. 



NOVEMBER, 1907. 



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, 2jj.§ ft. 

 Height of Wind Instrutnents 72 ft. 



MONTHLY SUMMARY. 



t'reaaure. In inches. 



Maxnuuni reduced to freezing, 30.28, ist,S A. 

 Minimum reduced to freezing, 28. 70, 6tli, 11 p 

 Keducedl maximum reading, 30.59, ist, 8 a. 

 Reducedt minimum reading, 29.00, 6th, 11 P 



Mean semi-daily reduced, 3o-049 



Monthly range 1-59 



*Air Temperature. In Degrees Fahr. 



Highest 60.0, 2d, 12 p.; 3d,0A. 



Lowest 19-5. i5th, 7 A. 



Mean hourly, . . . ." 37-6 



Mean of means of max. and min., .... 3S.6 



Mean sensible (wet bulb), 34.7 



Monthly range 40.5 



Highest mean daily 52.5,3d 



Lowest mean daily 27.0, 30th 



Mean maximum, 46.9 



Mean minimum, 30.2 



Mean daily range 16.7 



Greatest daily range 32.5,1st 



Least daily range, 5.0,25th 



Hu>nidity. 



.Mean dew point, 32.0 



Mean force of vapor, 221 



.Mean relative humidity, 85. 9 



Precipitation. In inches. 



Total precipitation, 4.50 



Number of days on which .01 inch or more 



rain or melted snow fell 13 



Total snow, in inches, i 



• Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement, 4773m. 



Greatest daily movement, . . . . 376 ni. ,7th 



Least daily movement, 32m., 21st 



Mean daily movement i59ni. 



Mean hourly velocity, 6.6 m. 



Maximum pressure per square foot, 8.5 lbs.= 



41 m. per hour, 3d, i A., S. E. 

 Maximum velocity for 5 minutes, 36 m. per 



hour 7th, 5 p., VV. 

 Prevailing Direction, West. 



Summary. 



West 17 per cent. 



Southwest, 17 



North, 13 



South Southeast, 13 



West Northwest 10 



West Southwest lo 



Other directions, 20 



Weather. 



Mean cloudiness observed, . . . .48 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . i68hrs.=57 per cent. 



Number of clear days, 6 



Number of fair days, 12 



Number of cloudy days 12 



liriglit Sunshine. 

 Number of hours recorded, . . 125 hrs.=435( 

 Rain, 2d, 3d, 6th, 7th, loth, iSth, 19th, 21st 



22d, 24th, 2Sth. 

 Snow, 24th, 25th, 26th, 27th. 

 Sleet, 21 St. 



Gates, 35 miles or more per hour, 4i"m., 3d, 

 S. E.; 36 mi, 4th, N. W. 



