BULLETIN No. 224. 



AUGUST, 1907. 



Meteorological Observations 



AT TH1>: 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Heif^ht of barometer above ground, ^r ft. Above sea level, 2"/^.^ ft. 

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



fresHure. In inches. 



Maxiimim reduced to freezing, 30.06, igth,8A. 

 Mininiuni reduced to freezing, 29.35, 2;th, 3 A. 

 Reduced! maxinuim reading, 3o-35i 19th, 8 A. 

 Reduced! niininuim reading, 29.64, 25th, 3 A. 



Mean semi-daily reduced, • 29.995 



Monthly range, 0.71 



* Air Temperature. In Degrees Fahr. 



Highest 96-0. 12th, 4 p. 



Lowest 41.0, 29th, 6 A. 



Mean hourly, 66.1 



Mean of means of max. and min 66.5 



Mean sensible (wet bulb), 60.2 



Monthly range, 55-o 



Highest mean daily, 78.5,12th 



Lowest mean daily, 56.0, 30th 



Mean maximum, 79-2 



Mean minimum, 53-8 



Mean daily range 25.4 



Greatest daily range, 40.5. 19th 



l-east daily range, 7.5,24th 



Hiiiniilltti. 



Mean dew point 56.5 



Mean force of vapor, . . 633 



Mean relative humidity 74.9 



Precipitation. In inches. 



Total precipitation, 1.44 



Number of days on which .01 inch or more 



rain or melted snow fell, 11 



* Temperature in ground shelter. 

 t Reduced to freezing and se.a-level. 



lyinU. 



Total movement, 3928m. 



Greatest daily movement, . . . . 214 m., 26th 

 Least daily movement, ..... 47m., 30th 



Mean daily movement 126 m. 



Mean hourly velocity, .5.3 m. 



Maximum pressure per square foot, 4.5 lhs.= 

 30 m. per hour, 22d, 9 A., N.N.W. 



Maximum velocity for 5 minutes, 24 m. per 



hour 26th, 3 P., W.N.W. 

 Prevailing Direction, West Southwest. 



Summary. 



West, 10 per cent. 



Northwest, 16 " " 



South Southeast, 29 " " 



West Northwest 13 " " 



Other directions, 32 " " 



IVeatlier. 



Mean cloudiness observed, . • . .36 per cent. 



Total cloudiness recorded by the Sun 'i'her- 



mometer, . . . 2i2hrs.=49 per cent. 



Number of clear days, 13 



Number of fair days, 12 



Number of cloudy days, 6 



Br iff lit StitLihiue. 



Number of hours recorded, . . 217 lirs. = 5m 

 Rain, ist, 2d, 4th, 5th, 6th, 17th, 21st, 24tli, 



27th, 28th, 30th. 

 Gales, 35 miles or more per hour, none. 

 Thunder and Lightning , ist, 2d. 



