BULLETIN No. 308. 



AUGUST, 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, Ji ft. Above sea level, zyj.j ft. 

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



Pressure. In inclies. 



Maximum reduced to freezing, 29 g;, 26th, S A. 

 Minimum reduced to freezing, 29.42, 24th, 5 A. 

 Reduced^ maximum reading, 30.26, 26th, 8 A. 

 Reducedt minimum reading, 29.71, 24tli, 5 A. 



Mean semi-daily reduced, 30.00S 



Montlily range 0.55 



•Air Toinperature. In Degrees Fahr. 



Highest, 95-0, 9th, 2:30 P. 



Lowest, 47.5, 25th, 6 A.; 26th, 6 A. 



Mean liourly, 68.9 



Mean of means of max. and min., .... 69.7 



Mean sensible (wet bulb), 635 



Monthly range, 47-5 



Highest mean daily 79 7. loth 



Lowest mean daily, 60.5,29th 



Mean maximum, 79 9 



Mean minimum, 59-6 



Mean daily range, 20.3 



Greatest daily range, 32.0, 9th 



Least daily range, 3-5. 29th 



Huuiirtity. 



Mean dew point, 60.8 



Mean force of vapor 



Mean relative humidity, 80.3 



Precipitation. In inches. 



Total precipitation, 51 



Number of days on which .01 inch or more 



rain fell 10 



♦Temperature in ground shelter. 

 1 Reduced to freezing and sea-level. 



Total movement 3i9Sm. 



Greatest daily movement, .... 226m., nth 



Least daily movement, 43ni., 26th 



Mean daily movement, 103 m 



Mean hourly velocity, 4-3 ni 



Maximum pressure per square foot, 17.0 lbs.= 



SSm. per hour, 21st, i P., N.N.W. 

 Maximum velocity for 5 minutes, 3on). per 



hour, 2ist, I P., N.N.W. 

 Prevailing Direction, West. 



Summary. 



South Southwest 32 per cent. 



North • • 10 " " 



Northwest I 10 " " 



North Northeast 10 " " 



Other directions 38 " " 



Weather. 



Mean cloudiness observed, .... 61 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer 220hrs.=5i per cent. 



Number of clear days, 2 



Number of fair days, 19 



Number of cloudy days, 10 



Bright Sunshine. 



Number of hours recorded, . . 209 hrs=49*. 

 Rain, 1st, 3d, 5th, nth, 12th, i6th, 17th, 



iSth, 19th, 20th, 2ist, 24th, 28th, 29th. 

 Thunder and Liglitnins, 3d, ilth, 20th, 



24th. 

 Gales, 35 or more miles per hour : 58m, 21st, 



N.N.W. 



