BULLETIN No. 457. 



JANUARY 1927 



Meteorolooical Observations 



o 



AT THK 



MASSACHUSETTS 



r THC 



AGllIC U L T UUA L EXPEIU MeW "'"' 



STATION. 



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



Height of barometer above ground, 5^ fi- Above sea level, 2jj.^ ft. 

 Height oj Wind Ifistruments J2 ft. Time used, "j^thMer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maxiniiini reduced to freezing, 30.66, 27th, g a. 

 Mininuini reduced to freezing, 28.99, 5th, 3 a. 

 Reduced maximum reading, 31.00, 27th, 9 A. 

 Reduced minimum reading, 29.30,5th, 3 a. 



Mean semi-daily reduced 30.126 



Monthly range i 



Air Temperature. 



In Degrees Fahr. 



Highest 47.0, 29th, 4:30 p. 



Lowest -12.0, 27th, 6 a. 



Mean hourly 22.4 



Mean of means of max. and min 22.7 



Mean sensible (wet bulb) 19.8 



Monthly range 59° 



Highest mean daily 39-4. 29th 



Lowest mean daily i.9. 27th 



Mean maximum .32.4 



Mean minimum 130 



Mean daily range i9-4 



Greatest daily range 37°. 26th 



Least daily range 3°. 21st 



Humidity. 



Mean dew point 170 



Mean force of vapor 128 



Mean relative humidity 85.3 



Precipitation. In inches. 



Total precipitation, in inches 2.50 



Total snow, in inches I'l 



Number of days on which .01 inch or more 



rain fell '4 



Days of sleighing 3i 



Wind. 



Total movement 4618m 



Greatest daily movement 353"!. 7th 



Least daily movement 22m, 3d 



Mean daily movement 149m 



Mean hourly velocity * 6.2m 



Maximum pressure per square foot, 13.0 lbs = 



51m per hour, 31st, 3 p.. W. N.W. 

 .Maximum velocity for 5 minutes, m 3oper 



hour, 26th, 5 a., W. 

 Prevailing direction, West, Northwest 

 Summary. 



North 23 per cent 



Northwest i6 " " 



West Northwest 13 " " 



South 13 " " 



South Southwest 10 " " 



Other directions 25 " " 



Weather. 



Mean cloudiness observed .... 55 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 174 hours = 59 per cent 



Number of clear days 8 



Number of fair days 9 



Number of cloudy days 14 



Briiiht Sunshine. 



Number hours recorded. 123 = 41 per cent. 

 Rain. 4th, 15th, 18th, 19th, 20th, 21st, 22nd, 



2Sth, 29th, 30th. 

 Snow, ist, 4th, nth, 15th, i6th, i8th, 23d, 



2Sth. 

 Gales. 35m, 5th, W.N.W.:42m,6th, W.N.W.; 



41m, nth, N.: 50m, 15th, N.: 45m, i6th, 



N. W.; 45m, 26th, W.; 51m, 31st W. N. W. 



