Massacliusetts A^ucultural Ci^lkga, 

 AMHERST, MASS. 



BULLETIN No. 443. 



NOVEMBER 1925 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGllICULTUKAL EXPEKIMENT 



STATION. 



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



Height of barometer above ground, 51 ft. Above sea level, 2'jj.^ ft. 

 Height 0/ Wind Instruments 72 ft. Time used, l^th Mer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, 30.36, 4th, 12 p. 

 Minimum reduced to freezing, 28. 78, 13th, 10 A 

 Reduced maximum reading, 30.67, 4th, 12 P. 

 Reduced minimum reading, 29.08, 13th, 10 A. 



.Mean semi-daily reduced 30.086 



Monthly range i.59 



Air Temperature. In Degrees Fahr. 



Highest 62.0, i6th, 2.30 A. 



Lowest ii.o, 30th, 7 A. 



Mean hourly 37.4 



Mean of means of max. and min 3 



Mean sensible (wet bulb) 33.7 



Mimthly range S'-O 



Highest mean daily 53.2, 13th 



Lowest mean daily 18.7,30th 



Mean maximum 47-3 



Mean minimum 28.8 



.Mean daily range 18.5 



Greatest daily range 36.5, ist 



Least daily range 4.5> 14th 



Hnmidity. 



Mean dew point 29.4 



Mean force of vapor 224 



Mean relative humidity 77.8 



Precipitation. In inches. 



Total precipitation, in inches 3.23 



Total snow, in inches, \ 



Number of days on which .01 inch or more 

 rain fell V 



Wind. 



Total movement 5i73ni 



Greatest daily movement 446m, 17th 



Least daily movement . . . . 30m, 2d, 12th 



Mean daily movement 172 m 



Mean hourly velocity 7.2m 



Maximum pressure per square foot, 20.5 lbs = 



64in per hour, i6th, i A., S. 

 Maximum velocity for 5 minutes, 36m per 



hour, 16th, 2 A., S. 

 Prevailing direction, West. 

 Summary. 



Northwest 23 per cent 



South 20 " " 



Southwest 13 " " 



North Northwest, 10 '• " 



Other directions 3? " " 



Weather. 

 Mean cloudiness observed .... 47 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 171 hours = 57 per cent 



Number of clear days 6 



Number of fair days 11 



Number of cloudy days 13 



Brit^ht Sunshine. 



Number hours recorded, 127 = 43 per cent. 



Bain. 6th, 7th, 8th, 12th, 13th, 14th. 15th, i6th, 



27th. 

 Snow, 27th. 



Frosts, before the 16th; ist, 2d, 5th, 7th, nth. 

 Gales. 40m, Sth, S. S. W.; 59m, 13th, E.S. E.; 



45m, 14th, N. W.; 56m, 15th, S.; 64m, 



i6th,S.: 40m, 17th, N. W. 



