METEOROLOGICAL OBSERVATORY 



OF THE 



Hatch Experiment Station 



MASSACHUSETTS AGRICULTURAL COLLEGE 



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



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

 Height of Wind Instru7nefits 72 ft. 



BULLETIN No. 143. 



NOVEMBER, 1900. 



MONTHLY SUMMARY. 



Preaaxire, In inches. 

 Maximum reduced to freezing, 30.34, 17th, 7 a. 

 Minimum reduced to freezing, 28.63, Qth, 12 m. 

 Reducedt maximum reading, 30.64, 17th, 7 A. 

 Reducedt minimum reading, 28.93, 9th, 12 m. 



Mean tri-daily reduced, 29.992 



Monthly range ■ 1.71 



*Air Tetnperature. In Degrees Fahr. 



Highest, 67.0, 2nd, i p. 



Lowest 12.0, 17th, 5 A. 



Mean hourly, 41.3 



Mean of means of max. and min., .... 40.8 



Mean sensible (wet bulb), 37.9 



Monthly range 55.0 



Highest mean daily 59.2, 2nd 



Lowest mean daily, 25.4, i6th 



Mean maximum, 48.9 



Mean minimum, 32.8 



Mean daily range, '. 16.1 



Greatest daily range, 33.0, 7th 



Least daily range, 5.0, 25th, 26th 



Sumidity. 



Mean dew point, 32.0 



Mean force of vapor 276 



Mean relative humidity, 75.9 



Precipitation. In inches. 



Total precipitation, . • 5.87 



Number of days on which .01 inch or more 



rain or melted snow fell 17 



Snow, Total in inches, 1.5 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement 4877m. 



Greatest daily movement, .... 404 m., loth 



Least daily movement, im., 29th 



Mean daily movement, 162.6 m. 



Mean hourly velocity, 6.8 m. 



Maximum pressure per square foot, iS lbs.= 



60 m. per hour, loth, 2 A., N.N.VV. 

 Prevailing Direction, West, Southwest. 

 Summary. 



North, 17 per cent. 



Southwest, 17 " " 



West, 13 " " 



South, Southwest, 10 " " 



Other directions, 43 " " 



Weather. 

 Mean cloudiness observed, .... 72 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 207.5 hrs.=7i per cent. 



Number of clear days, i 



Number of fair days, n 



Number of cloudy days, 18 



Br iff Jit Sunsliine. 

 Number of hours recorded, . . . 85.5 hrs.=29?S 

 Rain, ist, 7th, Sth, 9th, 15th, 17th, iSth, 19th, 



20th, 2ISt, 23d, 24th, 25th, 26th, 27th, 29th, 

 30th. 



Snow, 9th, 15th, 24th, 27th, 29th, 30th. 



Qales, 35 miles or more per nour, 5Sm., 9th, 

 N.N.W.; 60m., loth, N.N.W.; 36m., 12th, 

 S.W.; 40m., 15th, W.; 53m., 2ist, W.; 

 47m., 22d, W.N.W.; 39m., 23d, W.S.W. 



