METEOROLOGICAL OBSERVATORY 



OK THE 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE. 



^A^UVCiiEE-ST. 



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



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

 Height of IVi/id Ifistru/ne/its 22 ft. 



BULLETIN No. 166. 



OCTOBER, 1902. 



MONTHLY SUMMARY. 



fi'etsitfe. In inches. 

 Miiximum reduced to freezing, 30.21, 26th, 7 A. 

 Mininuim reduced to freezing, 28.97, 28th, 3 p- 

 Reducedt maximum reading, 30.52, 26th, 7 A. 

 Reduced^ minimum reading, 29.27, 28th, 3 p. 



Mean tri-daily reduced, 30.028 



Monthly range • 1.25 



*Air Teinperutiire. In Degrees Fahr. 



Highest, 74.0, 19th, 3 p. 



Lowest, 22.5, 22d, 6 a. 



.Mean hourly, 50.7 



Mean of means of max. and min 50.3 



Mean sensible (wet bulb), 46.2 



Monthly range 51.5 



Highest mean daily 63.6, 19th 



Lowest mean daily 39.2, 22d 



Mean maximum, 61.0 



Mean minimum, 39.6 



Mean daily range 2r.4 



Greatest daily range, 32.5, 22d 



Least daily range, 4.5, ist 



HitmidUij. 



.Mean dew point 40.5 



Mean force of vapor, 396 



Mean relative humidity, 70.9 



HrecipiUttion. In inches. 



Total precipitation, 5.59 



Number of days on which .01 inch or more 

 rain or melted snow fell, . ... . . . 11 



Snow, total in inches trace 



• Temperature in ground shelter. 

 t Reduced to freezing and sea-level. 



Uiiid. 



Total movement, 439Sm. 



Greatest daily movement, . . . . 312m., 25th. 



Least daily movement 6m., 18th. 



Mean daily movement, 142 m. 



Mean hourly velocity, 5.9 ni. 



Maximum pressure per square foot, 8.0 lbs.= 



40 m. per hour, 29th, 5 p., W.N.W. 

 I'revaihng Direction, West, Southwest. 

 Summary. 



South, Southeast, 19 per cent 



North, Northwest 13 " " 



West 16 •' " 



West, Southwest, 10 " " 



Other directions, 42 " " 



Weather. 

 .Mean cloudiness observed, . . . .51 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 177 hrs.=52 per cent. 



Numter of clear days, 7 



Number of fair days, 10 



Number of cloudy days, 14 



Itright Sunshine. 

 Number of hours recorded, . . . 164 hrs. =4851 

 Bain, ist, 4th, 5th, nth, 12th, iSth, 19th, 20th, 



22d, 23d, 24th, 27th, 28th, 30th. 



Snoiv, 29th. 



Thunder and Lightning, 19th, 20th, 24tli. 



Killiug frost, loth. 



Heavy Vrosts, 15th, 17th, 21st, 22d, 24th, 



26th, 30th. 

 Gales, 35 miles or more per hour, 35 m. 13th, 



S.S.E.; 40 ni. 29th, W.N.W. 



