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BULLETIN No. 467. 



NOVEMBER, 1927 



Meteorolomcal Observations 



AT THK 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



ffei^ht of ha ro meter above ground, 51 ft. Above sea level, 2jj.j ft. 

 Height oj Wind Instruments J2 ft. 2'i?ne used, j^thMer. 



MONTHLY SUMMARY. 



Pressiiie. In inches. 



Nhiximinii reduced to freezing, .■^0.42, 13th. p 

 Minimum reduced to freezing, 2S.73, 4th,6 A. 

 Reduced maximum reading, 30.73, 13th, 10 p. 

 Reduced minimum reading, 29.02, 4th, 6 a 



Mean semi-daily reduced 30.08 



Monthly range 1.7 



Air Temperature, In Degrees Fahr. 



Highest 70.0, 2d, I p. 



Lowest 20.0, 10th, 7:30 A 



Mean hourly 440 



Mean of means of max. and min 43.9 



Mean sensible (wet bulb) 41.0 



Monthly range 50.0 



Highest mean daily 64.2, 17th 



Lowest mean daily 28.1,20th 



Mean maximum 52.3 



Mean minimum 35.5 



Mean daily range 16.8 



Greatest daily range 32.5, 14th 



Least daily range 6.0,3rd 



Humidity. 



Mean dew point 3S S 



Mean force of vapor 297 



Mean relative humidity 84.3 



Precipitation. In inches. 



Total precipitation, in inches S.64 



Number of days on whicli .01 inch or more 

 rain fell 10 



Wind. 



Total movement 52i3ni 



Greatest daily movement 456ni, 17th 



Least daily movement 65m, 9th 



Mean daily movement I74ni 



Mean hourly velocity 7.2m 



Maximum pressure per square foot, 17.0 lbs = 



58m per hour, 17th, 7 r. S.S.W. 

 Maximum velocity for 5 minutes, 33m per 



hour, nth, 7 p., S.S.W. 

 Prevailing direction. Southwest 

 Summary. 



South 33 per cent 



Northwest 17 " " 



South Southwest 13 " " 



Southwest 10 " " 



Other directions 27 " " 



Weather. 

 Mean cloudiness observed .... 72 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 232 hours = 78 per cent 



Number of clear days i 



Number of fair days 5 



Number of cloudy days 24 



Bright SuuRfaine. 



Number hours recorded, 66= 22 per cent. 

 Rain. 2d, 3d. 4th, 5th, 17th, iSth, 24th, 26th, 



27th, 28th 29th. 

 Thunder and Lidhtninii. I7fh. 

 Snow. Toth. 

 Frosts, before the i6th 



7th, Sth, 9th, loth, 13th, 14th. 

 Gales, 42m, 3d, S.: 55m, 4th, W.S.W.: 35m, 



7th, N.W.: 58m, 17th, S.S.W.: 49m, 



18th ,S.W. 



