BULLETIN No. 294. 



JUNE, 1913 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGllICULTURAL EXPElilMENT 



STATION. 



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



Height of barometer above ground. Sift- Aboi'e sea level, 2'/j.^ ft. 

 Height of iViiui Instruments 72 ft. 



MONTHLY SUMMARY. 



Pregsure. In inclies. 



Maxuuuiu reduced to freezing, 30 14. iDth, 9 A. 

 Minimum reduced to freezing, 29.34, 2d, 3 a. 

 Reduced! maximum reading, 30.43,10th, 9 A. 

 Reducedt minimum reading, 29.63, 2d, 3 A. 



Mean semi-daily reduced, 29.996 



Montlily range o.So 



*Air Teinperivture. In Degrees Falir. 



Highest 92.0. i6th, 3:30 p 



Lowest 37.0, loth, 5 A 



Mean hourly, 66.4 



Mean of means of max. and min 66.0 



Mean sensible (wet bulb), 594 



Monthly range, 55 o 



Highest mean daily 77.2, i6th 



Lowest mean daily, 52.3i 9tli 



Mean maximum So.o 



Mean minimum, 5i-9 



Mean daily range 28 



Greatest daily range, 37.5,29th 



Least daily range, 12.5,20th 



Humidity. 



Mean dew point 54.6 



Mean force of vapor, 644 



Mean relative humidity, 68.4 



Precipitation. In inches. 



Total precipitation, 



Nnmljer of days on which .01 inch or more 



rain fell, • 6 



* Temperature in ground shelter. 

 Reduced to freezing and sea-level. 



Wind. 



Total movement 3746m. 



Greatest daily movement, .... 227ni., 6th 



Least daily movement 41m., 21st 



Mean daily movement 125 m 



Mean hourly velocity 5.2 m 



Maximum pressure per square foot, 4.5 lbs.= 



3oin. per hour, 3d, 11 A., S.S.W. 

 Maximum velocity for 5 minutes, 24 m. per 



hour, 3d, i P., S.S.W. 

 Prevailing Direction, West Northwest. 



Summary. 



North Northwest 20 per cent. 



Northwest 10 " " 



West 13 " " 



West Southwest 10 " " 



South 13 " " 



Other directions 34 " " 



Weather. 



Mean cloudiness observed, • • • • 35 per cent 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 145 hrs.=32 per cent. 



Number of clear days, 9 



Number of fair days, 19 



Number of cloudy days, 2 



Bright Suiisliine. 



Number of hours recorded, . . 312 hrs = 

 Rain, 2d, 4th, 7th, i6th, 19th, 20th, 21st. 

 Tliunder and Lifflitninff, 7th. 

 Gales, 35 or more miles per hour : None 



6,S«. 



