METEOROLOGICAL OBSERVATORY 



Hatch Experiment Station 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



Height of barometer above ground^ 51 fi- Above sea level, 2yj.^ ft. 

 Height of Wind Instruments y2 ft. 



BULLETIN No. 154. 



OCTOBER, 1901. 



MONTHLY SUMMARY. 



Fresstire. In inches. 

 Maximum reduced to freezing, 3o.j5,29th, g a. 

 Minimum reduced to freezing, 29.15, 23d, 6 p. 

 Reducedt maximum reading, 30.66, 2gtli, 9 A. 

 Keducedt minimum reading, 29.44, 23d, 6 p- 



Mean tri-daily reduced 30.084 



Monthly range ■ 1.22 



*Ali' Temperature. In Degrees Fahr. 



Highest, 75-0, nth, 3 p., 23d, 3 p. 



Lowest 24.0, 29th, 7:30 A. 



Mean liourly, 5o-i 



Mean of means of max. and min., .... 50.7 



Mean sensible (wet bulb), 45«7 



Monthly range 51.0 



Highest mean daily 63.2, nth 



Lowest mean daily, 40.7, 29th. 



Mean maxinuim, 63.1 



Mean minimum, 38.2 



Mean daily range, 24.9 



Greatest daily range, 38.0, Sth. 



I-east daily range, 8.5, 2d. 



Hitiniilitif. 



Mean dew point, 39.9 



Mean force of vapor 399 



Mean relative humidity, 70.5 



Precipitation. In inches. 



Total precipitation, . • 3.SS 



Number of days on which .01 inch or more 

 rain or melted snow fell, 8 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement, 3652ni. 



Greatest daily movement, .... 241 m., 23d. 

 Least daily movement, ...... 14 m., 29th 



Mean daily movement 117.8 m. 



Mean hourly velocity, 4.9 m. 



Maximum pressure per square foot, 9.0 lbs.= 



42 m. per hour, 23d, 8 p., W.N.W. 

 Prevailing Direction, West. 

 Summary. 



South, 10 per cent. 



West, 19 " " 



Northwest, 13 " " 



North Northwest, 13 " " 



North, 13 " " 



West Southwest, 10 " " 



South southeast 10 " " 



Other directions 12 " " 



Weatlier. 

 Mean cloudiness observed, .... 48 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 163 hrs.=48 per cent. 



Number of clear days, 8 



Number of fair days, 14 



Number of cloudy days, 9 



Bright Simshine. 

 Number of hours recorded, . . . 178 lirs. = 52jt 

 Itain, 2d, 3d, 6th, 13th, 14th, 15th, 17th, 



18th, 19th, 24th. 

 Snow, iSth, 24th. 

 Mail, 24th. 

 Gales, 35 miles or more per hour, 36m., 6th, 



E.N.E., 42m., 23d, W.N.W. 

 Frost, 4tb, 5th, 7th, Sth, i6th, 20th, 21st, 26th, 

 28th, 29th, 30th. 



