BULLETIN No. 3 I O. 



OCTOBER, 1914 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



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

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maxmiiun reduced to freezing, 30 30, 14th, ioa. 

 Miuinuim reduced to freezing, 29.31, 26th, 3 p. 

 Reduced! maximum reading, 30.60, 14th, ic A. 

 Reduced!" minimum reading, 29.60, 26th, 3 P. 



Mean semi-daily reduced, 3o-o95 



Monthly range i-oo 



*Air Temperature. In Degrees Fahr. 



Highest, 84.5. 3d, 4:30 P- 



Lowest, 22.0, 28th, 2:30 A. 



Mean liourly, 53-5 



Mean of means of max. and min 54.2 



Mean sensible (wet bulb), 47-6 



Monthly range, 62.5 



Highest mean daily, .68.3, nth 



Lowest mean daily, 35-o> 27th 



Mean maximum, 66.1 



Mean minimum, 42.2 



Mean daily range, 23.9 



Greatest daily range, 5o-5i 3^ 



Least daily range 4-5- I7th 



Humidity. 



Mean dew point, 42. 9 



Mean force of vapor 393 



Mean relative humidity, 75-3 



Precipitation. In inches. 



Total precipitation 2.09 



Number of days on which .01 inch or more 



rain fell 



♦Temperature in ground shelter. 

 1 Reduced to freezing and sea-level. 



Wind. 



Total movement, 3612m. 



Greatest daily movement, .... 306m., 27th 



Least daily movement, 20m., 3d 



Mean daily movement, 117 m 



Mean hourly velocity, 4.9 ni 



Maximum pressure per square foot, 6.5 lbs.= 



36m. per hour, 27th, ioa., N.W. 

 Maximum velocity for 5 minutes, 24m. per 



hour, 30th, 2:30 P., W.N.W. 

 Prevailing Direction. Southwest. 



Summary. 



North 19 per cent. 



South 19 " " 



Southwest 1 16 



East 10 " " 



Other directions 36 " " 



Weatiier. 



Mean cloudiness observed 44 per cent. 



Total cloudiness recorded by the Sun Ther- 

 mometer, .... i77hrs.= 52 per cent. 



Number of clear days, 8 



Number of fair days 10 



Number of cloudy days 13 



Brjgrlit Sunsliine. 



Number of hours recorded. . . 164 hrs=48^. 

 Rain -9th, i6th, 17th, i8th, 19th, 24th, 27th, 



20th, 30th. 

 Snow, 27th. 

 Frosts, 2d, 3d, 4th, 28th. 

 Gales, 35 or more miles per hour: 36m, 27th, 



N.W. 



