METEOROLOGICAL OBSERVATORY 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



Latitiide, 42° 23' 48.5" N. Lougitude, 72° 31' 10" W. 



Height of instruments above ground,51ft. Above sea levels 273.5 ft. ** 



BULLETIN No. 107. 



NOVEMBER, 1897. 



MONTHLY SUMMARY- 



Pressure. In inches. 

 Maximum reduced to freezing, 30.29,28th,nA. 

 Minimum reduced to freezing, 28.82, 9tli, 7 P. 

 Reducedf maximum reading, 30.60, 2Sth, llA- 

 Reduced! min. reading, . . . . 29.12.,9tli, 7 p' 



Mean reducedf 30.034 



Monthly range 1.47 



*A.lr Temperature. In Degrees Fahr. 



Highest 63.0; 4th, 3 P. 



Lowest 5.0, 24th, 6 A. 



Mean, 36.9 



Mean of means of max. and min 36.2 



Mean 8ensible(wet bulb), 35.3 



Monthly Range 58.0 



Highest mean daily, . 53.2,26th 



Lowest mean daily, • . . . 2L2, 24tli 



Mean maximum 44.7 



Mean minimum 27.7 



Mean daily range 17.(1 



Greatest daily range, 34.0, 27th 



Least daily i-ange 3.5, 19ih 



Uutnidity. 



.Mean dew point, 31.? 



Mean force of vapor 239 



Mean relative humidity 83.2 



Wind. 



Prevailing Direction, West. 



Summary. 



.South 17 per cent. 



South West, 10 " " 



North West 23 " " 



WCft, 13 " " 



North 13 " " 



Other directions 24 " " 



Total movement 4558 m. 



Greatest daily movement, . . . 331 m., 27th 



Least daily movement 12 m., 15th 



Mean daily movement 151.9 m. 



Mean hourly velocity .6.3 m. 



Maximum pressure per square foot, 20 lb8.= 

 63 m. per hour, 11 p., 9th, W. 



I'recipifation. In inches. 



Total precipitation fi.85 



Number of days on which .01 inch or more 



rain or melted snow fell, 19 



Weather. 

 Mean cloudiness observed, . .71.4 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 203 hours or 69.3 per cent. 



Number of clear days, 2 



Numberof fair days, 9 



Number of cloudy days, 19 



Bright Sunshine. 

 Number of Hours recorded, 90 hours or 30.7?( 

 liain, lst,2d,3d,8th,9th, llth, 12th, l.'jth,]6th, 

 17th, i9th, 2uth, 21st, 22d, 23d, 25th, 26th, 

 27th, 29ih. 

 Snow, l-.'th, 17th, 20th, 23d, 29th. 

 Hail, 8th, 25th. 



Gales, of 35 or more miles per hour, 35m., 

 6th, W.N. W.; 41m., 7th, W.N.W.;63m., 

 9th, W.; 35m., 10th, N.W.; 37m., 12th, 

 W.N.W.; 44m., 13th, N.W.; 35m., 16th, 

 S.S.W.; 36m., 17th, N.W.; 46m., 26th, 

 S.S.W.; 35ra., 27th,N.W.; 36m.,29th,N.W.; 

 37m., 30th, N.N.W. 



* Temperature in ground shelter. 



t Reduced to freezing and sea level. 



* * Determined from levels of B. &M. R. R. 



