BULLETIN No. 359. 



NOVEMBER, 19 18 



Meteorologrical Observations 



o 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATIOIsl. 



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



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

 Height oj Whid Instruments J 2 ft. Time used, j^th Mer. 



MONTHLY SUMMARY. 



PressDte. In inches. 

 Maximum reduced to freezing, 30.29, 6th, 9 A 

 Minimum reduced to freezing, 2S.75, i8th, 9 P 

 Reduced maximum reading . . 30.60, 6th, 9 A 

 Reducedt minimum reading, . 29.05, i8th, g p 



Mean semi-daily reduced 30.023 



Monthly range 1-55 



*Air Temperatore. In Degrees Fahr. 



Highest 62.5, 8th, 1:30 p 



Lowest 15.5,27th, 5 A 



Mean hourly 39-4 



Mean of means of max. and min 40.0 



Mean sensible (wet bidb) 35.6 



Monthly range 470 



Highest mean daily 56-6, iSth 



Low^est mean daily 22.0, 26th 



Mean maximum 48. 6 



Mean minimum 31.3 



Mean daily range 17.3 



Greatest daily range . . .' 31.5, 7th 



Least daily range 3.5, 20th 



Humidity. 



Mean dew point 32.0 



Mean force of vapor 235 



Mean relative humidity 81.3 



Precipitation. In inches. 



Total precipitation, in inches 2.87 



Total snow, in inches 'i'race 



Number of days on which .01 inch or more 



rain fell 



•Temperature in ground shelter. 



••Reduced to freezing and sea-level. 



Wind. 



Total movement 3730 m 



Greatest daily movement 297m, 23d 



Least daily movement 24m, 17th 



Mean daily movement 124 m 



Mean hourly velocity 5.2 m 



Maximum pressure per square foot, 6.0 lbs = 



3;m per hour, i8th, 6 A, S.S.W. 

 Maximum velocity for 5 minutes, 24m per 



hour, 30th, 1:30 p, W. 

 Prevailing direction, West. 



Summary. 



South 13 per cent. 



West .Southwest 17 



West Northwest 13 



North 10 



West 10 



Northwest 10 



North Northwest 10 



Other directions 17 



Weather. 



Mean cloudiness observed .... 49 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 1S5 hours = 63 per cent 



Number of clear days 4 



Number of fair days 9 



Number of cloudy days 17 



Bright Sunshine. 



Number hours recorded, 108 hrs, = 37 per cent 

 Rain, 4th, 17th, i8th, 19th, 20th, 2Sth, 29th. 

 Snow. 4th, 30th. 



Gales, 35 miles or more per hour 35 m 

 uSth, S.S.W. 



