BULLETIN No. 370. 



OCTOBER, 19 19 



Meteorolodcal Observations 



c? 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, ^i ft. Above sea level, ^73-5 f^- 

 Height oj Wind Instruments 12 ft. Tifne used, yphAIer. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Maximum reduced to freezing, 30.30, 30th, S A 

 Minimum reduced to freezing, 29.26, 28th, 3 p 

 Reduced maximum reading . 30.61, 30th, S A 

 Reduced minimum reading, 29.55, zSth, 3 P 



Mean semi-daily reduced 30.123 



Monthly range 1.06 



*Alr Temperature. In Degrees Fahr. 



Highest 81.5, 3d, I p 



Lowest 27.0, 30th, 4 A 



Mean hourly 51.2 



Mean of means of max. and min 51.6 



Mean sensible (wet bulb) 47.1 



Monthly range 54.5 



Highest mean daily 65.2. 3d 



Lowest mean daily 34.8, 30th 



Mean maximum 62.2 



Mean minimum 41. i 



Mean daily range 2r.i 



Greatest daily range 36.0, 7th, gth 



Least daily range 7.0, 4th 



Humidity. 



Mean dew point 44.6 



Mean force of vapor 378 



Mean relative humidity 83.8 



Precipitatiou. In inches. 



Total precipitation, in inches i.Si 



Total snow, in inches 



Number of days on which .01 inch or more 

 rain fell 13 



•Temperature in ground shelter. 

 ••Reduced to freezing and sea-level. 



Wind, 



Total movement 2914 m 



Greatest daily movement 199m, nth 



Least daily movement .... 19m, 3otii 



Mean daily movement g4m 



Mean hourly velocity 3-9 m 



Maximum pressure per square foot, 8,5 lbs 



41m per hour, 2Sth, 3?, W. 

 Maximum velocity for 5 minutes, 24m per 



hour, 2Sth, 3P, W. 

 Prevailing direction, Southwest. 



Summary. 



South 19 per cent 



South Southwest 16 " " 



South Southeast 10 " " 



West 10 " " 



Northwest 10 •' " 



Other directions 35 " " 



Weather. 



Mean cloudiness observed .... 57 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 193 hours = 57 per cent. 



Number of clear days 4 



Number of fair days 12 



Number of cloudy days 15 



Bright Sunshine. 



Number hours recorded, 14S hrs,=r 43 per cent. 

 Rain. 2d, 3d, 6th. 9th, nth, i6th, 17th, 21st, 



26th, 27th, 28th, 30th, 31st. 

 Frosts. 8th, 9th, 13th, 29th. 

 Hail, 30th 

 Gales, 35 miles or more per hour: 41m, 



28th, W. 



