BULLETIN No. 236. 



AUGUST. I908. 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, 5^ fi- Above sea level, 2jj.^ ft. 

 Height of Wind Instnmiejits 72 ft. 



MONTHLY SUMMARY. 



l^reasure. In inches. 



Maxumiin reduced to freezing, 3005. 31st, 9 a. 

 Miniiniiin reduced to freezing, 29.38, 19th, 5 p. 

 Reducedl niaxiniuni reading, 30.34, 31st, 9 a- 

 Reducedt niininuuii reading, 29.66, i9tli, 5 p- 



Mean semi-daily reduced 3o-o3o 



Montlily range 0.6S 



*Air Temperature. In Degrees Fahr. 



Highest 88.5, 14th, 3 i"- 



Lowest 37-0. 29th, 6 A. 



Mean hourly 66.6 



Mean of means of max. and min 67.0 



Mean sensible (wet bulb), 61.0 



Monthly range S'-S 



Highest mean daily. 77.2,13th 



Lowest mean daily, 55-7. 29th 



Mean maximum, 7S-5 



Mean minimum 55-5 



Mean daily range, 23.0 



Greatest daily range, ' . . . 38.5, 30th 



Laast daily range 6.0, 17th, 26th 



Hntniditif. 



Mean dew point 5^3 



Mean force of vapor, 63s 



Mean relative humidity, 790 



Preci/titatitm. In inches. 



Total precipitation, 4.27 



Number of days on which .01 inch or more 

 rain or melted snow fell, 8 



* Temperature in ground shelter. 

 t rteduced to freezing and sea-level. 



Wind. 



Total movement, 38o2ni. 



Greatest daily movement 268m., 13th. 



Least daily movement . 44m., 3d. 



Mean daily movement 123 m. 



Mean hourly velocity, ^ . 5.1 m. 



Maximum pressure per square foot, 4.0 lbs.= 



28m. per hour, 27th, 11 A., N.N.E. 

 Maximum velocity for 5 minutes, 22m. per 



hour 13th, 2 p., S. 

 Prevailing Direction, West. 



Summary. 



West 16 per cent 



Northwest 22 " 



West Northwest 13 " 



Southwest 13 " 



South Southwest, '3 " 



Other directions, 23 " 



Weather. 



Mean cloudiness observed, . • . .45 per cent 

 Total cloudiness recorded by the Sun Ther- 

 mometer,' 161 hrs.=38 per cent. 



Numljer of clear days, 13 



Number of fair days, 12 



Number of cloudy days, 6 



lirlght Sunshine. 



Number of hours recorded, . . 268 hrs.=62^ 

 Rain, 4th, 5th, 6th, 7th, loth, 13th, 17th, 22d, 



26th. 

 Thunder and TjUjhtning— 4th, 5th, 6th, 



7th, loth, 12th, 13th, 17th. 

 Qales, 35 miles or more per honr ; None- 



