

BULLETIN No. 466. 



OCTOBER, 1927 



Meteorological Observations 



o 



AT THK 



MASSACHUSETTS 



AGllICULTURAL EXPERIMENT 



STATION. 



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



Heitrht of barometer above ground, §1 ft. Above sea level, 2jj.j ft. 

 Height oj Wind Instruments J 2 ft. Titne used, J^thMer. 



MONTHLY SUMMARY. 



'ressiire. 



In inches. 



Maximum reduced to freezing, 30.05, 31st, 6a. 

 Minimum reduced tofreezino;, 28. S3, 20th, 2 f- 

 Reduced maxinuim reading, 30.37, 31st, 6 a. 

 Reduced minimum reading, 29.13, 20th, 2 p 



Mean semi-daily reduced 29.974 



Monthly range 1.24 



Air Temperature. 



In Degrees Fahr. 



Highest S9.o,2d. 3P. 



Lowest 24.0, 31st, 7 A. 



Mean hourly 53.5 



Mean of means of max. and niin 54.0 



Mean sensible (wet bulb) 49.1 



Monthly range 65.0 



Highest mean daily 72.8, ist 



Lowest mean daily 41. S, 30th 



.Mean maximum 65.9 



Mean mininunn 42 



Mean daily ran.ge 23.S 



Greatest daily range 42.5, 26th 



Least daily range 7.0, 9th 



Humidity. 



Mean dew point 46 2 



Mean force of vapor 397 



Meanrelative humidity S5.3 



Preriiiitatioii. In inches. 



Total precipitation, in inches 4.59 



Number of days on which .01 inch or more 

 rain fell 8 



Wiii.l. 



Total movement 4oS2m 



Greatest daily movement 27gni, 4th 



Least daily movement 42m, 20th 



Mean daily movement 132m 



Mean hourly velocity 5.5m 



Maximum pressure i)er square foot, 12.5 lbs = 



joni [)er hour, 21st, 12 M. N.W. 

 Maximum velocity for ; minutes, 32m per 



hour, 2ist, 10 A.. N.W. 

 Prevailing direction. South Southwest 



Weather. 



Mean cloudiness observed .... 39 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 126 hours = 37 per cent 



Number of clear days 13 



Number of fair days 13 



Number of cloudy days 5 



Briiiht Sunshine. 



Number hours recorded. 215 =^ 63 per cent. 



Itain. 3d, 4th, 7th, 8th. 9th, 13th, 17th, 19th, 



20t h . 

 Frosts, nth, 15th, i6th, 24th, 30th, 31st. 

 Gales, 3;m, 3d, S.; 40m, 4tii, W.: 37m, 12th, 



S.:45m, 13th, S.: 5oni, 21st, N.W.; 



42m. 22d, N.W. 



