LIBRARY OF THE 

 Massachusetts A.-nrnUUiilKJ^Ve^p' > uC 



AMHKR S T. J S iAiia, ~ 



BULLETIN No. 460. 



APRIL, (927 



iMeteorolooical Observations 



MASSACHUSETTS 



AGlllCULTUlUL EXrElUMENT 



STATION. 



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



Height of barometer aboTe _i^roun,i, 5t ft. Above sea level, 2yj.^ ft. 

 Height oj Wind Instruments Y2 ft. Time used, j^thAIer. 



MONTHLY SUMMARY. 



'ressiire. 



In inches. 



Miixinuim reduced to freezing, 30.15, 15th, S A 

 Mininuim reduced to freezing, 29.15, 29th, 6 A 

 Reduced maximum reading, 30.46. 15th, 8 A. 

 Reduced minimum reading, 29.46,29th, 6 A 



Mean semi-daily reduced 3o-o5; 



Mi>nthly range 1.00 



Air Toiupern<iire. In Degrees Fahr. 



Highest 85.0, 20th, I p. 



Lowest 22.0, 4th, 6 A.; 5th, 6 A. 



Mean liourly 45.4 



Mean of means of max. and min 45.0 



Mean sensible (wet bulb) 39-2 



Monthly range 630 



Highest mean daily 64.4, 20th 



Lowest mean daily 3i-7. S^h 



Mean maximum 58-° 



Mean minimum 



Mean daily range 26.0 



Greatest daily range 44°. i6th 



Least daily range 15.0,10th 



Humiility. 



Mean dew point 33-3 



Mean force of vapor 296 



Mean relative humidity 68. 7 



Precipitation. In inches. 



Total precipitation, in inches 1.60 



Total snow, in inches 2 



Number of days on whicli .01 inch or more 

 rain fell 7 



>Viii<l. 



Total movement 5374m 



Greatest daily movement 404ni, 7th 



Least daily movement 67m, 30th 



Mean daily movement 179m 



Mean hourly velocity 7.5ni 



Maximum pressure per square foot. 16.0 lbs = 



57ni per hour, nth, 2 p.. N.N.W. 

 Maxinuim velocity for 5 minutes, 30m per 



hour, 7th, 3 p., N.W. 

 Prevailing direction. West Northwest 

 Summary. 



North 13 per cent 



South 13 ' 



West Northwest 13 " 



Northwest 23 " 



Nortii Northwest lo " 



Other directioTis 28 " 



M'^eatlier. 



Mean cloudiness observed .... 34 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 194 hours = 48 per cent 



Number of clear days 4 



Number of fair days 17 



Number of cloudy days 9 



Britibt Sunshine. 

 Number hours recorded. 208 = 52 per cent. 

 Rain. 2d, 5th, 6th, 16th, 17th, 21st, 22d, 23d, 

 25th, 26th, 27th, 

 Snow, 2d, 5th. 



Thunder and Litihtninii, 2ist, 22d. 

 FroMlH. after the 15th, 25th, L'6th. 

 Gales. 50m, 7th, N.W.; 44m, 8th, N.; 45ni, 



(otli, N.; 57m, nth, N.N.W.: 42m, i4tli. 



N.W.; 40m, 25th, W,; 45m, 26th, S.; 40m, 



2Sth, W.N.W.: 51m, 29th, W. N. W. 



