BULLETIN No. 262. 



OCTOBER, 19 10 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION. 



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



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

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



fresMure, In inches. 



Maximum reduced to freezing, 30 17, 8th, 8 A- 

 Minimum reduced to freezing, 29.13, 27th, 4 p. 

 Reduced! maximum reading, 3<^-47i ^^th, 8 A. 

 Keducedt minimum reading, . 29.42, 27th, 4 P- 



Mean semi-daily reduced, 30.006 



Monthly range 1.05 



*Air Temperature. In Degrees Fahr. 



Higliest, 84.0, 5th, i p. 



Lowest 19-0, 31st, 7 A. 



Mean hourly, 5i-7 



Mean of means of max. and niin 52.3 



Mean sensible (wet bulb), 45-6 



Monthly range, 65-° 



Highest mean daily, 72.0, 5th 



Lowest mean daily, 32.5. 3oth 



Mean maximum, 64.5 



Mean minimum, 40-o 



Mean daily range, 24.5 



Greatest daily range 38.0, iSth 



Least daily range 7.0,115th 



Hiitnidity, 



Mean dew point 4i-2 



Mean force of vapor, 375 



Mean relative humidity 75° 



P_recipUation. In inches. 



rotal precipitation, 0.93 



Number of days on which .01 inch or more 



rain fell, ' 7 



♦Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement, 5467m. 



Greatest daily movement, . . . .352m., 6th. 



Least daily movement, 33m., 31st. 



Mean daily movement 176.0 m. 



Mean hourly velocity, 7-3 ni. 



Maximum pressure per square foot, 8.0 lbs.= 



40m. per hour, 2d, lA., N.W. 

 Maximum velocity for 5 minutes, 36m. per 



hour 27th, 7P., W.S.W. 

 Prevailing Direction, West. 

 Summary. 



West Northwest 13 percent. 



South Southwest 19 



North Northwest 13 



Southwest 13 



Northwest 10 



North 10 



Other directions 22 



Weather. 

 Mean cloudiness observed, . ... 44 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, ii2hrs.=33 per cent. 



Number of clear days, 12 



Number of fair days, 14 



Number of cloudy days, 5 



Rright Sunshine. 

 Number of hours recorded, . . 229 hrs.= 67^ 

 Rain, 7th, gth, 14th, 15th, 22d, 23d, 25th, 27th, 



2Sth. 

 Snow, 27th. 



Frosts, 13th, 29th, 30th, 31st. 

 Thunder and L,ightning, gth, 25th. 

 Gales, 35 or more miles per hour : 40m, 2d, 

 I A, N.W. 



