BULLETIN No. 334. 



OCTOBER, 19 16 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of haroineter above ground, ^i ft. Above sea level, 2"/^.^ ft. 

 Height of Wind Instrutnents 72 ft. 



MONTHLY SUMMARY. 



Pressnie. In inches. 

 Maximum reduced to freezing, 30.22, i8th, 10 p 

 Minimum reduced to freezing, 29.21, I7tli, 4 A 

 Reducedt maximum reading, 30.53, iStii, 10 p 

 Reduced! minimum reading, 29.50, 17th, 4 a 



Mean semi-daily reduced 30.131 



Monthly range 1.03 



*Air Temperature. In Degrees Fahr. 



Highest S4.0, 8th, 3:30 P 



Lowest 25.5, 18th, 6 A 



Mean hourly 50,9 



Mean of means of max. and min 51.7 



Mean sensible (wet bulb) 44.9 



Monthly range 58; 



Highest mean daily 67. S, 20th 



Lowest mean daily 39.6, iSth 



Mean maximum 65.2 



Mean minimum 38.1 



Mean daily range ?7.i 



Greatest daily range 43.0, 8th 



Least daily range 9.5, 20th 



Hnmidity. 



Mean dew point 41.3 



Mean force of vapor 360 



Mean relative humidity 78.4 



Precipitation. In inches. 



Total precipitation, in inches i.oi 



Number of days on which .01 inch or more 



rain fell 3 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level, 



Wind. 



Total movement 4176 m 



Greatest daily movement 422m, 17th 



Least daily movement 3m, 3d 



Mean daily movement 135 ni 



Mean hourly velocity 5.6 m 



Maximum pressure per square foot, 20.o|lbs = 



63m per hour, 17th, iia, W.N.W. 

 Maximum velocity for 5 minutes, 42m per 



hour, 17th, 2P, W.N.W. 

 Prevailing direction. West Northwest. 



Summary. 



North Northwest 13 per cent 



West 16 " 



West Southwest 10 " 



.South Southwest 10 ' 



Northwest 13 " 



North 16 ' 



Other directions 22 ' 



Weather. 



Mean cloudiness observed .... 43 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . .113 hours = 33 per cent 



Number of clear days 14 



Number of fair days 11 



Number of cloudy days 6 



Bright Sunshine. 



Number hours recorded, 22S hrs, = 67 per cent 

 Rain. 9th, 13th, 19th, 20th, 2ist, 25th, 29th, 



31st. 

 Frosts, 2d, 3d, I2th, i8th, 23d, 24th, 27th. 

 Gales, 35 or more miles per hour. 41m, 13th, 



S.W.; 39m, 14th, N.W.; 63m,|i7th, W.N. 



W.; 36m, 19th, E.S.E.; 46m, 20th, S.; 38m, 



26th, N.W. 



