y 



BULLETIN No. 452. 



AUGUST 1926 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



L;ititude, 42° 23' 48.5" N. Longitude 72* 31' 10" \V. 



Heii^^ht of barometer above-ground, ji ft. Above sea level, 2jj.^ ft. 

 Height oj Wifui Instruvients 72 ft. Time used, y^t/i Mer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximiun reduced to freezing, 30.10, 21st, 7 a. 

 Miniiiuini reduced to freezing, 29.46,7th, 5 p 

 Reduced maximum reading, 30.40 21st, 7 a. 

 Reduced mininuim readijig, 29.75,7th, 5 p. 



Mean semi-daily reduced 30.004 



Monthly range 0.65 



Air Teinperalure. In Degrees Fahr. 



Highest 91.5,3d, 2 p. 4th, 3-30 p 



Lowest 45.0,21st, b\ 



Mean hourly 67.7 



Mean of means of max. and niin 69.0 



Mean sensible (wet bulb) 63 



Monthly range 46.5 



Highest mean daily 76 6, 4th 



Lowest mean daily 57. S, 21st 



Mean maximum ; 



Mean minimum 59.3 



Mean daily range 19.; 



Greatest daily range 31.0, 2Sth 



Least daily range 7.5, i6th 



Humidiiy. 



Mean dew point 61.4 



Mean force of vapor 67S 



Mean relative humidity S2.7 



Precipitation. In inches. 



Total precipitation, in inches 3 97 



Number of days on which .01 inch or more 



rain fell 10, 



Wind. 



Total movement 237501 



Greatest daily movement 212m, 29tli 



Least daily movement . . . . 21m, loth 



Mean daily movement 77m 



Mean hourly velocity 3.2m 



Maximum pressure per squarefoot, 4.5 lbs = 

 30m per hour, 30th, 4 p., W. 



Maximum velocity for 5 minutes, 2oni per 



hour, 30th, 4 p., W. 

 Prevailing direction, South 



Summary. 



South 42 per 



North 10 



West 10 



Other directions 38 



LIBWARY Of T 



MassacMsetts Agricult 



er cent. —X— , »j 



Weather. 



Mean cloudiness observed .... 60 per cent 

 'I'otal cloudiness recorded by the Sun 



Thermometer . . 224 hours = 52 per cent 



Number of clear days 3 



Numljer of fair days 13 



Number of cloudy days 15 



Briiiht Sunshine. 



Number hours recorded. 205 = 48 per cent. 

 Rain. 2d, 3d, 7th, nth, r2th, 13th, 14th. 

 16th, 19th, 22d, 23d, 24th, 26th, 



Thunder and Liiihtninii. 2d, 3d, 7th, 



12th. 2ftth. 

 Gales. None 



