,\ias.^adii.. aillural CoUeue, 



AIViHEHST, MASS. 



BULLETIN No. 423. 



MARCH. 1924 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



Height of barometer above ground, 51 ft. Above sea level, 2jj.j ft. 

 Height oj Wind Jnstrume/its 72 ft. Time used, y^thMer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing 29.90, 31st, 12 p 

 Minimum reduced to freezing, 28.91, 12th. 4 a 

 Reduced maximum reading, 30.21. 31st, 12 p. 

 Reduced minimum reading, 29.22. 12th, 4 a. 



Mean semi-daily reduced 29 772 



Monthly range 0.9S 



Air Temperature. In Degrees Fahr. 



Highest 58.0, 23rd, 5 p 



Lowest 8.0, 2d, 7A 



Mean hourly 34.4 



Mean of means of max. and min 34.4 



Mean sensible (wet bulb) 29.7 



Monthly range 50.0 



Highest mean daily 41.7, 28th 



Lowest mean daily 24.2, 2d 



Mean maximum 43.5 



Mean minimum 26.0 



Mean daily range 17.5 



Greatest daily range 35.0, 23rd 



Least daily range 5.0,11th 



Humidity. 



Mean dew point 23.4 



Mean force of vapor 190 



Mean relative humidity 70.2 



Precipitation. In inches. 



Total precipitation, in inches 1.05 



Total snow, in inches 24 



Number of days on which .01 inch or more 



rain fell 6 



Days of sleighing 4 



Wind. 



Total movement 66ooni 



Greatest daily movement 553m, 12th 



Least daily movement 32m, 3rd 



Mean daily movement 213m 



Mean hourly velocity 8.9ni 



Maximum pressure per square foot, 20.0 lbs = 



63m per hour, 12th, 5 a., N.N.E. 

 Maximum velocity for 5 minutes, 36m per 



hour, 2Sth, 2 p., W.N. W. 

 Prevailing direction. North Northwest. 

 Summary. 



North Northwest 16 per cent 



Northwest '3 " " 



North 13 " " 



Northeast 10 " " 



West Northwest 10 " " 



Other directions 38 " " 



Weather. 



Mean cloudiness observed .... 44 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 79 hours = 21 percent. 



Number of clear days 22 



Number of fair days 6 



Number of cloudy days 3 



Briiiht Sunshine. 



Number hours recorded, 292 = 79 per cent. 



Rain, jth, 7th, nth, 12th, 26th, 29tli, 30th. 



Thunder and Lii^htninit, 29th. 



SnoMT 7th, uth, 12th, 26th, 2Sth, 29th. 



Gales, 57 m., nth, N. E.; 63m., 12th, N.N.E.; 

 41m., 13th, N.; 45m., 14th, :N. W., 45m., 

 15th., N. W.; 49m, 16th., N. \V.; 46m., 17th; 

 N. W.; 36m., iSth, N. W.: j8ni., 19th, N.; 

 36m , 20th, N.; 39m., 2ist, E. N. E.: 35m., 

 22d., N. E.: 35m., 27th, N N. E.: 59ni., 

 28th, W. N. \V.; 4ini., 31st, W. N. W. 



